diff --git a/package-lock.json b/package-lock.json
index 3c5b640ee..5744e8753 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -66,7 +66,10 @@
       }
     },
     "@ampproject/toolbox-cache-list": {
-      "version": "file:packages/cache-list"
+      "version": "file:packages/cache-list",
+      "requires": {
+        "@ampproject/toolbox-core": "^2.5.4"
+      }
     },
     "@ampproject/toolbox-cache-url": {
       "version": "file:packages/cache-url",
@@ -78,17 +81,30 @@
     "@ampproject/toolbox-cli": {
       "version": "file:packages/cli",
       "requires": {
+        "@ampproject/toolbox-cache-list": "^2.5.4",
+        "@ampproject/toolbox-cache-url": "^2.5.4",
+        "@ampproject/toolbox-core": "^2.5.4",
+        "@ampproject/toolbox-linter": "^2.5.14",
+        "@ampproject/toolbox-optimizer": "^2.5.14",
+        "@ampproject/toolbox-runtime-fetch": "^2.5.13",
+        "@ampproject/toolbox-runtime-version": "^2.5.4",
+        "@ampproject/toolbox-update-cache": "^2.5.6",
         "minimist": "1.2.5",
         "minimist-options": "4.1.0",
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-          "resolved": "https://registry.npmjs.org/@ampproject/toolbox-optimizer/-/toolbox-optimizer-2.5.5.tgz",
-          "integrity": "sha512-OanuEl5ChEg7y0zLBj7HwN0Nr9+7M9KXmqD8dpDd29S2oRUng5WVZ6nuu6ZOV1k4iyP1j8pPqFum8GFGQ30H3A==",
-          "requires": {
+          "version": "2.5.14",
+          "resolved": "https://registry.npmjs.org/@ampproject/toolbox-optimizer/-/toolbox-optimizer-2.5.14.tgz",
+          "integrity": "sha512-UTXKVwDKn/xsNOHYroFUtQRxnukdZuiYj7iM1rCAvRmDT9MqrtMTVG8boGjxt5aHLgCnrUZEMz+8d61iBYZeDQ==",
+          "requires": {
+            "@ampproject/toolbox-core": "^2.5.4",
+            "@ampproject/toolbox-runtime-version": "^2.5.4",
+            "@ampproject/toolbox-script-csp": "^2.5.4",
+            "@ampproject/toolbox-validator-rules": "^2.5.4",
             "abort-controller": "3.0.0",
+            "cross-fetch": "3.0.5",
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             "domhandler": "3.0.0",
@@ -100,6 +116,30 @@
             "postcss": "7.0.32",
             "postcss-safe-parser": "4.0.2",
             "terser": "4.8.0"
+          },
+          "dependencies": {
+            "cssnano": {
+              "version": "4.1.10",
+              "resolved": "https://registry.npmjs.org/cssnano/-/cssnano-4.1.10.tgz",
+              "integrity": "sha512-5wny+F6H4/8RgNlaqab4ktc3e0/blKutmq8yNlBFXA//nSFFAqAngjNVRzUvCgYROULmZZUoosL/KSoZo5aUaQ==",
+              "requires": {
+                "cosmiconfig": "^5.0.0",
+                "cssnano-preset-default": "^4.0.7",
+                "is-resolvable": "^1.0.0",
+                "postcss": "^7.0.0"
+              }
+            }
+          }
+        },
+        "cosmiconfig": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-5.2.1.tgz",
+          "integrity": "sha512-H65gsXo1SKjf8zmrJ67eJk8aIRKV5ff2D4uKZIBZShbhGSpEmsQOPW/SKMKYhSTrqR7ufy6RP69rPogdaPh/kA==",
+          "requires": {
+            "import-fresh": "^2.0.0",
+            "is-directory": "^0.3.1",
+            "js-yaml": "^3.13.1",
+            "parse-json": "^4.0.0"
           }
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@@ -162,6 +202,15 @@
             "entities": "^2.0.0"
           }
         },
+        "import-fresh": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-2.0.0.tgz",
+          "integrity": "sha1-2BNVwVYS04bGH53dOSLUMEgipUY=",
+          "requires": {
+            "caller-path": "^2.0.0",
+            "resolve-from": "^3.0.0"
+          }
+        },
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           "version": "1.2.5",
           "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
@@ -187,6 +236,11 @@
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           }
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+        "resolve-from": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-3.0.0.tgz",
+          "integrity": "sha1-six699nWiBvItuZTM17rywoYh0g="
+        },
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           "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
@@ -215,11 +269,18 @@
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     "@ampproject/toolbox-cors": {
-      "version": "file:packages/cors"
+      "version": "file:packages/cors",
+      "requires": {
+        "@ampproject/toolbox-cache-list": "^2.5.4",
+        "@ampproject/toolbox-cache-url": "^2.5.4",
+        "@ampproject/toolbox-core": "^2.5.4"
+      }
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     "@ampproject/toolbox-linter": {
       "version": "file:packages/linter",
       "requires": {
+        "@ampproject/toolbox-cache-list": "^2.5.4",
+        "@ampproject/toolbox-cache-url": "^2.5.4",
         "amphtml-validator": "1.0.31",
         "chalk": "4.1.0",
         "cheerio": "1.0.0-rc.3",
@@ -359,9 +420,13 @@
     "@ampproject/toolbox-optimizer": {
       "version": "file:packages/optimizer",
       "requires": {
+        "@ampproject/toolbox-core": "^2.5.4",
+        "@ampproject/toolbox-runtime-version": "^2.5.4",
+        "@ampproject/toolbox-script-csp": "^2.5.4",
+        "@ampproject/toolbox-validator-rules": "^2.5.4",
         "abort-controller": "3.0.0",
         "cross-fetch": "3.0.5",
-        "cssnano": "4.1.10",
+        "cssnano-simple": "1.0.5",
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         "domhandler": "3.0.0",
         "domutils": "2.1.0",
@@ -482,16 +547,24 @@
     "@ampproject/toolbox-optimizer-express": {
       "version": "file:packages/optimizer-express",
       "requires": {
+        "@ampproject/toolbox-core": "^2.5.4",
+        "@ampproject/toolbox-optimizer": "^2.5.14",
+        "@ampproject/toolbox-runtime-version": "^2.5.4",
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-          "resolved": "https://registry.npmjs.org/@ampproject/toolbox-optimizer/-/toolbox-optimizer-2.5.5.tgz",
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-          "requires": {
+          "version": "2.5.14",
+          "resolved": "https://registry.npmjs.org/@ampproject/toolbox-optimizer/-/toolbox-optimizer-2.5.14.tgz",
+          "integrity": "sha512-UTXKVwDKn/xsNOHYroFUtQRxnukdZuiYj7iM1rCAvRmDT9MqrtMTVG8boGjxt5aHLgCnrUZEMz+8d61iBYZeDQ==",
+          "requires": {
+            "@ampproject/toolbox-core": "^2.5.4",
+            "@ampproject/toolbox-runtime-version": "^2.5.4",
+            "@ampproject/toolbox-script-csp": "^2.5.4",
+            "@ampproject/toolbox-validator-rules": "^2.5.4",
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+            "cross-fetch": "3.0.5",
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             "domhandler": "3.0.0",
@@ -503,6 +576,30 @@
             "postcss": "7.0.32",
             "postcss-safe-parser": "4.0.2",
             "terser": "4.8.0"
+          },
+          "dependencies": {
+            "cssnano": {
+              "version": "4.1.10",
+              "resolved": "https://registry.npmjs.org/cssnano/-/cssnano-4.1.10.tgz",
+              "integrity": "sha512-5wny+F6H4/8RgNlaqab4ktc3e0/blKutmq8yNlBFXA//nSFFAqAngjNVRzUvCgYROULmZZUoosL/KSoZo5aUaQ==",
+              "requires": {
+                "cosmiconfig": "^5.0.0",
+                "cssnano-preset-default": "^4.0.7",
+                "is-resolvable": "^1.0.0",
+                "postcss": "^7.0.0"
+              }
+            }
+          }
+        },
+        "cosmiconfig": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-5.2.1.tgz",
+          "integrity": "sha512-H65gsXo1SKjf8zmrJ67eJk8aIRKV5ff2D4uKZIBZShbhGSpEmsQOPW/SKMKYhSTrqR7ufy6RP69rPogdaPh/kA==",
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+            "is-directory": "^0.3.1",
+            "js-yaml": "^3.13.1",
+            "parse-json": "^4.0.0"
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@@ -565,6 +662,15 @@
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+          "resolved": "https://registry.npmjs.org/import-fresh/-/import-fresh-2.0.0.tgz",
+          "integrity": "sha1-2BNVwVYS04bGH53dOSLUMEgipUY=",
+          "requires": {
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+            "resolve-from": "^3.0.0"
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@@ -588,6 +694,11 @@
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+          "resolved": "https://registry.npmjs.org/resolve-from/-/resolve-from-3.0.0.tgz",
+          "integrity": "sha1-six699nWiBvItuZTM17rywoYh0g="
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@@ -700,7 +811,10 @@
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     "@ampproject/toolbox-runtime-version": {
-      "version": "file:packages/runtime-version"
+      "version": "file:packages/runtime-version",
+      "requires": {
+        "@ampproject/toolbox-core": "^2.5.4"
+      }
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     "@ampproject/toolbox-script-csp": {
       "version": "file:packages/script-csp"
@@ -708,6 +822,8 @@
     "@ampproject/toolbox-update-cache": {
       "version": "file:packages/update-cache",
       "requires": {
+        "@ampproject/toolbox-cache-list": "^2.5.4",
+        "@ampproject/toolbox-cache-url": "^2.5.4",
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+      "dev": true
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@@ -4298,9 +4415,9 @@
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+      "version": "1.5.4",
+      "resolved": "https://registry.npmjs.org/@types/q/-/q-1.5.4.tgz",
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@@ -5247,14 +5364,14 @@
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+      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.13.0.tgz",
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-        "electron-to-chromium": "^1.3.390",
-        "node-releases": "^1.1.53",
-        "pkg-up": "^2.0.0"
+        "caniuse-lite": "^1.0.30001093",
+        "electron-to-chromium": "^1.3.488",
+        "escalade": "^3.0.1",
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@@ -5448,9 +5565,9 @@
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+      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001107.tgz",
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@@ -6490,6 +6607,14 @@
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+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.0.5.tgz",
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@@ -6572,44 +6697,6 @@
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-        "cssnano-preset-default": "^4.0.7",
-        "is-resolvable": "^1.0.0",
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@@ -6647,6 +6734,63 @@
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+      "resolved": "https://registry.npmjs.org/cssnano-preset-simple/-/cssnano-preset-simple-1.1.4.tgz",
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+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
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+      "resolved": "https://registry.npmjs.org/cssnano-simple/-/cssnano-simple-1.0.5.tgz",
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+          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-6.1.0.tgz",
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     "cssnano-util-get-arguments": {
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@@ -7209,9 +7353,9 @@
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-          "integrity": "sha512-WwOrosiQTvyms+Ti5ZC5vGEK0Vod3FTt1ca+payZqvKuGJF+dq7bG63DstxtN0dpm6FxY27a/zS3Wten+gEtGw=="
+          "version": "3.3.0",
+          "resolved": "https://registry.npmjs.org/css-what/-/css-what-3.3.0.tgz",
+          "integrity": "sha512-pv9JPyatiPaQ6pf4OvD/dbfm0o5LviWmwxNWzblYf/1u9QZd0ihV+PMwy5jdQWQ3349kZmKEx9WXuSka2dM4cg=="
         },
         "domutils": {
           "version": "1.7.0",
@@ -18182,9 +18305,9 @@
           }
         },
         "mkdirp": {
-          "version": "0.5.4",
-          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.4.tgz",
-          "integrity": "sha512-iG9AK/dJLtJ0XNgTuDbSyNS3zECqDlAhnQW4CsNxBG3LQJBbHmRX1egw39DmtOdCAqY+dKXV+sgPgilNWUKMVw==",
+          "version": "0.5.5",
+          "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.5.tgz",
+          "integrity": "sha512-NKmAlESf6jMGym1++R0Ra7wvhV+wFW63FaSOFPwRahvea0gMUcGUhVeAg/0BC0wiv9ih5NYPB1Wn1UEI1/L+xQ==",
           "requires": {
             "minimist": "^1.2.5"
           }
@@ -19029,21 +19152,21 @@
       },
       "dependencies": {
         "es-abstract": {
-          "version": "1.17.5",
-          "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.5.tgz",
-          "integrity": "sha512-BR9auzDbySxOcfog0tLECW8l28eRGpDpU3Dm3Hp4q/N+VtLTmyj4EUN088XZWQDW/hzj6sYRDXeOFsaAODKvpg==",
+          "version": "1.17.6",
+          "resolved": "https://registry.npmjs.org/es-abstract/-/es-abstract-1.17.6.tgz",
+          "integrity": "sha512-Fr89bON3WFyUi5EvAeI48QTWX0AyekGgLA8H+c+7fbfCkJwRWRMLd8CQedNEyJuoYYhmtEqY92pgte1FAhBlhw==",
           "requires": {
             "es-to-primitive": "^1.2.1",
             "function-bind": "^1.1.1",
             "has": "^1.0.3",
             "has-symbols": "^1.0.1",
-            "is-callable": "^1.1.5",
-            "is-regex": "^1.0.5",
+            "is-callable": "^1.2.0",
+            "is-regex": "^1.1.0",
             "object-inspect": "^1.7.0",
             "object-keys": "^1.1.1",
             "object.assign": "^4.1.0",
-            "string.prototype.trimleft": "^2.1.1",
-            "string.prototype.trimright": "^2.1.1"
+            "string.prototype.trimend": "^1.0.1",
+            "string.prototype.trimstart": "^1.0.1"
           }
         },
         "es-to-primitive": {
@@ -19062,25 +19185,34 @@
           "integrity": "sha512-PLcsoqu++dmEIZB+6totNFKq/7Do+Z0u4oT0zKOJNl3lYK6vGwwu2hjHs+68OEZbTjiUE9bgOABXbP/GvrS0Kg=="
         },
         "is-callable": {
-          "version": "1.1.5",
-          "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.1.5.tgz",
-          "integrity": "sha512-ESKv5sMCJB2jnHTWZ3O5itG+O128Hsus4K4Qh1h2/cgn2vbgnLSVqfV46AeJA9D5EeeLa9w81KUXMtn34zhX+Q=="
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/is-callable/-/is-callable-1.2.0.tgz",
+          "integrity": "sha512-pyVD9AaGLxtg6srb2Ng6ynWJqkHU9bEM087AKck0w8QwDarTfNcpIYoU8x8Hv2Icm8u6kFJM18Dag8lyqGkviw=="
         },
         "is-regex": {
-          "version": "1.0.5",
-          "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.0.5.tgz",
-          "integrity": "sha512-vlKW17SNq44owv5AQR3Cq0bQPEb8+kF3UKZ2fiZNOWtztYE5i0CzCZxFDwO58qAOWtxdBRVO/V5Qin1wjCqFYQ==",
+          "version": "1.1.0",
+          "resolved": "https://registry.npmjs.org/is-regex/-/is-regex-1.1.0.tgz",
+          "integrity": "sha512-iI97M8KTWID2la5uYXlkbSDQIg4F6o1sYboZKKTDpnDQMLtUL86zxhgDet3Q2SriaYsyGqZ6Mn2SjbRKeLHdqw==",
           "requires": {
-            "has": "^1.0.3"
+            "has-symbols": "^1.0.1"
           }
         },
-        "object.getownpropertydescriptors": {
-          "version": "2.1.0",
-          "resolved": "https://registry.npmjs.org/object.getownpropertydescriptors/-/object.getownpropertydescriptors-2.1.0.tgz",
-          "integrity": "sha512-Z53Oah9A3TdLoblT7VKJaTDdXdT+lQO+cNpKVnya5JDe9uLvzu1YyY1yFDFrcxrlRgWrEFH0jJtD/IbuwjcEVg==",
+        "string.prototype.trimend": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/string.prototype.trimend/-/string.prototype.trimend-1.0.1.tgz",
+          "integrity": "sha512-LRPxFUaTtpqYsTeNKaFOw3R4bxIzWOnbQ837QfBylo8jIxtcbK/A/sMV7Q+OAV/vWo+7s25pOE10KYSjaSO06g==",
           "requires": {
             "define-properties": "^1.1.3",
-            "es-abstract": "^1.17.0-next.1"
+            "es-abstract": "^1.17.5"
+          }
+        },
+        "string.prototype.trimstart": {
+          "version": "1.0.1",
+          "resolved": "https://registry.npmjs.org/string.prototype.trimstart/-/string.prototype.trimstart-1.0.1.tgz",
+          "integrity": "sha512-XxZn+QpvrBI1FOcg6dIpxUPgWCPuNXvMD72aaRaUQv1eD4e/Qy8i/hFTe0BUmD60p/QA6bh1avmuPTfNjqVWRw==",
+          "requires": {
+            "define-properties": "^1.1.3",
+            "es-abstract": "^1.17.5"
           }
         }
       }
@@ -19478,7 +19610,8 @@
     "wrappy": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
-      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=",
+      "dev": true
     },
     "write": {
       "version": "1.0.3",
diff --git a/packages/optimizer/lib/transformers/SeparateKeyframes.js b/packages/optimizer/lib/transformers/SeparateKeyframes.js
index 0c1cc4d53..b1f7fede5 100644
--- a/packages/optimizer/lib/transformers/SeparateKeyframes.js
+++ b/packages/optimizer/lib/transformers/SeparateKeyframes.js
@@ -19,7 +19,7 @@ const {insertText, createElement, hasAttribute, firstChildByTag} = require('../N
 const safeParser = require('postcss-safe-parser');
 const postcss = require('postcss');
 
-const cssnano = require('cssnano');
+const cssnano = require('cssnano-simple');
 
 const allowedKeyframeProps = new Set([
   'animation-timing-function',
diff --git a/packages/optimizer/lib/warmup.js b/packages/optimizer/lib/warmup.js
index bd155c427..357ea3e69 100644
--- a/packages/optimizer/lib/warmup.js
+++ b/packages/optimizer/lib/warmup.js
@@ -44,17 +44,21 @@ async function warmupCaches() {
   log.error = (e) => {
     success = false;
   };
-  // Re-use config from AMP Optimizer
-  // TODO extract config into it's own class
-  const config = AmpOptimizer.create({log, fetch: fetchWithTimout}).config;
-  // Try to download all runtime data, this will fail if behind a proxy
-  await fetchRuntimeParameters(config);
-  if (success) {
-    log.info('Downloaded latest AMP runtime data.');
-  } else {
-    log.info(
-      'Failed downloading latest AMP runtime data. Proxies need to be configured manually, see https://github.com/ampproject/amp-toolbox/tree/main/packages/optimizer#fetch.'
-    );
+  try {
+    // Re-use config from AMP Optimizer
+    // TODO extract config into it's own class
+    const config = AmpOptimizer.create({log, fetch: fetchWithTimout}).config;
+    // Try to download all runtime data, this will fail if behind a proxy
+    await fetchRuntimeParameters(config);
+    if (success) {
+      log.info('Downloaded latest AMP runtime data.');
+    } else {
+      log.info(
+        'Failed downloading latest AMP runtime data. Proxies need to be configured manually, see https://github.com/ampproject/amp-toolbox/tree/main/packages/optimizer#fetch.'
+      );
+    }
+  } catch (e) {
+    // ignore - environment has not been setup yet
   }
 }
 
diff --git a/packages/optimizer/package-lock.json b/packages/optimizer/package-lock.json
index ed7124827..0349c3bce 100644
--- a/packages/optimizer/package-lock.json
+++ b/packages/optimizer/package-lock.json
@@ -5,62 +5,35 @@
   "requires": true,
   "dependencies": {
     "@ampproject/toolbox-core": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-core/-/toolbox-core-2.5.1.tgz",
-      "integrity": "sha512-XMt7Y7/Ga5HskqILTNwAmkrQSXM6KJ4Xf3fiEMy/yTldVg51SebAeTSzjKH+oisKhSw00Ogo4VL7AB6a2IrT3g==",
+      "version": "2.5.4",
+      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-core/-/toolbox-core-2.5.4.tgz",
+      "integrity": "sha512-KjHyR0XpQyloTu59IaatU2NCGT5zOhWJtVXQ4Uj/NUaRriN6LlJlzHBxtXmPIb0YHETdD63ITtDvqZizZPYFag==",
       "requires": {
-        "cross-fetch": "3.0.4",
+        "cross-fetch": "3.0.5",
         "lru-cache": "5.1.1"
-      },
-      "dependencies": {
-        "cross-fetch": {
-          "version": "3.0.4",
-          "resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.0.4.tgz",
-          "integrity": "sha512-MSHgpjQqgbT/94D4CyADeNoYh52zMkCX4pcJvPP5WqPsLFMKjr2TCMg381ox5qI0ii2dPwaLx/00477knXqXVw==",
-          "requires": {
-            "node-fetch": "2.6.0",
-            "whatwg-fetch": "3.0.0"
-          }
-        }
       }
     },
     "@ampproject/toolbox-runtime-version": {
-      "version": "2.5.1",
-      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-runtime-version/-/toolbox-runtime-version-2.5.1.tgz",
-      "integrity": "sha512-udkXpuJX+f0ogd/GFlpifXg5K+BSyWpou9gg53uxoSpPTlPO4ZPepJ4PLfgdq0oxMq7f/IDN1YN5ZFFNJHbrzw==",
+      "version": "2.5.4",
+      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-runtime-version/-/toolbox-runtime-version-2.5.4.tgz",
+      "integrity": "sha512-7vi/F91Zb+h1CwR8/on/JxZhp3Hhz6xJOOHxRA025aUFEFHV5c35B4QbTdt2MObWZrysogXFOT8M95dgU/hsKw==",
       "requires": {
-        "@ampproject/toolbox-core": "^2.5.1"
+        "@ampproject/toolbox-core": "^2.5.4"
       }
     },
     "@ampproject/toolbox-script-csp": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-script-csp/-/toolbox-script-csp-2.3.0.tgz",
-      "integrity": "sha512-Qba53ohvCH79sYl5O8K5GMSo/372OjuyxNc+XySG26sAsG26WpBKJEE0HTr8rsa//CD3Fc92FieT1gK5U/jK4Q=="
+      "version": "2.5.4",
+      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-script-csp/-/toolbox-script-csp-2.5.4.tgz",
+      "integrity": "sha512-+knTYetI5nWllRZ9wFcj7mYxelkiiFVRAAW/hl0ad8EnKHMH82tRlk40CapEnUHhp6Er5sCYkumQ8dngs3Q4zQ=="
     },
     "@ampproject/toolbox-validator-rules": {
-      "version": "2.3.0",
-      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-validator-rules/-/toolbox-validator-rules-2.3.0.tgz",
-      "integrity": "sha512-S10YIyOKettoRDWoyRymRyjzWZD4/qW7YfHNhHAS13QVneabRcU5MF7vEwkG6dHWx/UdufT5GbqYnvpQRMNt3Q==",
+      "version": "2.5.4",
+      "resolved": "https://registry.npmjs.org/@ampproject/toolbox-validator-rules/-/toolbox-validator-rules-2.5.4.tgz",
+      "integrity": "sha512-bS7uF+h0s5aiklc/iRaujiSsiladOsZBLrJ6QImJDXvubCAQtvE7om7ShlGSXixkMAO0OVMDWyuwLlEy8V1Ing==",
       "requires": {
-        "cross-fetch": "3.0.4"
-      },
-      "dependencies": {
-        "cross-fetch": {
-          "version": "3.0.4",
-          "resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.0.4.tgz",
-          "integrity": "sha512-MSHgpjQqgbT/94D4CyADeNoYh52zMkCX4pcJvPP5WqPsLFMKjr2TCMg381ox5qI0ii2dPwaLx/00477knXqXVw==",
-          "requires": {
-            "node-fetch": "2.6.0",
-            "whatwg-fetch": "3.0.0"
-          }
-        }
+        "cross-fetch": "3.0.5"
       }
     },
-    "@types/q": {
-      "version": "1.5.2",
-      "resolved": "https://registry.npmjs.org/@types/q/-/q-1.5.2.tgz",
-      "integrity": "sha512-ce5d3q03Ex0sy4R14722Rmt6MT07Ua+k4FwDfdcToYJcMKNtRVQvJ6JCAPdAmAnbRb6CsX6aYb9m96NGod9uTw=="
-    },
     "abort-controller": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
@@ -69,11 +42,6 @@
         "event-target-shim": "^5.0.0"
       }
     },
-    "alphanum-sort": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/alphanum-sort/-/alphanum-sort-1.0.2.tgz",
-      "integrity": "sha1-l6ERlkmyEa0zaR2fn0hqjsn74KM="
-    },
     "ansi-styles": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",
@@ -82,72 +50,11 @@
         "color-convert": "^1.9.0"
       }
     },
-    "argparse": {
-      "version": "1.0.10",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
-      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
-      "requires": {
-        "sprintf-js": "~1.0.2"
-      }
-    },
-    "boolbase": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/boolbase/-/boolbase-1.0.0.tgz",
-      "integrity": "sha1-aN/1++YMUes3cl6p4+0xDcwed24="
-    },
-    "browserslist": {
-      "version": "4.11.1",
-      "resolved": "https://registry.npmjs.org/browserslist/-/browserslist-4.11.1.tgz",
-      "integrity": "sha512-DCTr3kDrKEYNw6Jb9HFxVLQNaue8z+0ZfRBRjmCunKDEXEBajKDj2Y+Uelg+Pi29OnvaSGwjOsnRyNEkXzHg5g==",
-      "requires": {
-        "caniuse-lite": "^1.0.30001038",
-        "electron-to-chromium": "^1.3.390",
-        "node-releases": "^1.1.53",
-        "pkg-up": "^2.0.0"
-      }
-    },
     "buffer-from": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.1.tgz",
       "integrity": "sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A=="
     },
-    "caller-callsite": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/caller-callsite/-/caller-callsite-2.0.0.tgz",
-      "integrity": "sha1-hH4PzgoiN1CpoCfFSzNzGtMVQTQ=",
-      "requires": {
-        "callsites": "^2.0.0"
-      }
-    },
-    "caller-path": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-2.0.0.tgz",
-      "integrity": "sha1-Ro+DBE42mrIBD6xfBs7uFbsssfQ=",
-      "requires": {
-        "caller-callsite": "^2.0.0"
-      }
-    },
-    "callsites": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/callsites/-/callsites-2.0.0.tgz",
-      "integrity": "sha1-BuuE8A7qQT2oav/vrL/7Ngk7PFA="
-    },
-    "caniuse-api": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/caniuse-api/-/caniuse-api-3.0.0.tgz",
-      "integrity": "sha512-bsTwuIg/BZZK/vreVTYYbSWoe2F+71P7K5QGEX+pT250DZbfU1MQ5prOKpPR+LL6uWKK3KMwMCAS74QB3Um1uw==",
-      "requires": {
-        "browserslist": "^4.0.0",
-        "caniuse-lite": "^1.0.0",
-        "lodash.memoize": "^4.1.2",
-        "lodash.uniq": "^4.5.0"
-      }
-    },
-    "caniuse-lite": {
-      "version": "1.0.30001038",
-      "resolved": "https://registry.npmjs.org/caniuse-lite/-/caniuse-lite-1.0.30001038.tgz",
-      "integrity": "sha512-zii9quPo96XfOiRD4TrfYGs+QsGZpb2cGiMAzPjtf/hpFgB6zCPZgJb7I1+EATeMw/o+lG8FyRAnI+CWStHcaQ=="
-    },
     "chalk": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/chalk/-/chalk-2.4.2.tgz",
@@ -168,25 +75,6 @@
         }
       }
     },
-    "coa": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/coa/-/coa-2.0.2.tgz",
-      "integrity": "sha512-q5/jG+YQnSy4nRTV4F7lPepBJZ8qBNJJDBuJdoejDyLXgmL7IEo+Le2JDZudFTFt7mrCqIRaSjws4ygRCTCAXA==",
-      "requires": {
-        "@types/q": "^1.5.1",
-        "chalk": "^2.4.1",
-        "q": "^1.1.2"
-      }
-    },
-    "color": {
-      "version": "3.1.2",
-      "resolved": "https://registry.npmjs.org/color/-/color-3.1.2.tgz",
-      "integrity": "sha512-vXTJhHebByxZn3lDvDJYw4lR5+uB3vuoHsuYA5AKuxRVn5wzzIfQKGLBmgdVRHKTJYeK5rvJcHnrd0Li49CFpg==",
-      "requires": {
-        "color-convert": "^1.9.1",
-        "color-string": "^1.5.2"
-      }
-    },
     "color-convert": {
       "version": "1.9.3",
       "resolved": "https://registry.npmjs.org/color-convert/-/color-convert-1.9.3.tgz",
@@ -200,31 +88,11 @@
       "resolved": "https://registry.npmjs.org/color-name/-/color-name-1.1.3.tgz",
       "integrity": "sha1-p9BVi9icQveV3UIyj3QIMcpTvCU="
     },
-    "color-string": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/color-string/-/color-string-1.5.3.tgz",
-      "integrity": "sha512-dC2C5qeWoYkxki5UAXapdjqO672AM4vZuPGRQfO8b5HKuKGBbKWpITyDYN7TOFKvRW7kOgAn3746clDBMDJyQw==",
-      "requires": {
-        "color-name": "^1.0.0",
-        "simple-swizzle": "^0.2.2"
-      }
-    },
     "commander": {
       "version": "2.20.3",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.20.3.tgz",
       "integrity": "sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ=="
     },
-    "cosmiconfig": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/cosmiconfig/-/cosmiconfig-5.2.1.tgz",
-      "integrity": "sha512-H65gsXo1SKjf8zmrJ67eJk8aIRKV5ff2D4uKZIBZShbhGSpEmsQOPW/SKMKYhSTrqR7ufy6RP69rPogdaPh/kA==",
-      "requires": {
-        "import-fresh": "^2.0.0",
-        "is-directory": "^0.3.1",
-        "js-yaml": "^3.13.1",
-        "parse-json": "^4.0.0"
-      }
-    },
     "cross-fetch": {
       "version": "3.0.5",
       "resolved": "https://registry.npmjs.org/cross-fetch/-/cross-fetch-3.0.5.tgz",
@@ -233,190 +101,21 @@
         "node-fetch": "2.6.0"
       }
     },
-    "css-color-names": {
-      "version": "0.0.4",
-      "resolved": "https://registry.npmjs.org/css-color-names/-/css-color-names-0.0.4.tgz",
-      "integrity": "sha1-gIrcLnnPhHOAabZGyyDsJ762KeA="
-    },
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-          "integrity": "sha512-h7fJ/5uWuRVyOtkO45pnt1Ih40CEleeyCHzipqAZO2e5H20g25Y48uYnFUiShvY4rZWNJ/Bib/KVPmanaCtOhA==",
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@@ -1433,26 +251,6 @@
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-    "svgo": {
-      "version": "1.3.2",
-      "resolved": "https://registry.npmjs.org/svgo/-/svgo-1.3.2.tgz",
-      "integrity": "sha512-yhy/sQYxR5BkC98CY7o31VGsg014AKLEPxdfhora76l36hD9Rdy5NZA/Ocn6yayNPgSamYdtX2rFJdcv07AYVw==",
-      "requires": {
-        "chalk": "^2.4.1",
-        "coa": "^2.0.2",
-        "css-select": "^2.0.0",
-        "css-select-base-adapter": "^0.1.1",
-        "css-tree": "1.0.0-alpha.37",
-        "csso": "^4.0.2",
-        "js-yaml": "^3.13.1",
-        "mkdirp": "~0.5.1",
-        "object.values": "^1.1.0",
-        "sax": "~1.2.4",
-        "stable": "^0.1.8",
-        "unquote": "~1.1.1",
-        "util.promisify": "~1.0.0"
-      }
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     "terser": {
       "version": "4.8.0",
       "resolved": "https://registry.npmjs.org/terser/-/terser-4.8.0.tgz",
@@ -1463,47 +261,6 @@
         "source-map-support": "~0.5.12"
       }
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-    "timsort": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/timsort/-/timsort-0.3.0.tgz",
-      "integrity": "sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q="
-    },
-    "uniq": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
-      "integrity": "sha1-sxxa6CVIRKOoKBVBzisEuGWnNP8="
-    },
-    "uniqs": {
-      "version": "2.0.0",
-      "resolved": "https://registry.npmjs.org/uniqs/-/uniqs-2.0.0.tgz",
-      "integrity": "sha1-/+3ks2slKQaW5uFl1KWe25mOawI="
-    },
-    "unquote": {
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-      "resolved": "https://registry.npmjs.org/unquote/-/unquote-1.1.1.tgz",
-      "integrity": "sha1-j97XMk7G6IoP+LkF58CYzcCG1UQ="
-    },
-    "util.promisify": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/util.promisify/-/util.promisify-1.0.1.tgz",
-      "integrity": "sha512-g9JpC/3He3bm38zsLupWryXHoEcS22YHthuPQSJdMy6KNrzIRzWqcsHzD/WUnqe45whVou4VIsPew37DoXWNrA==",
-      "requires": {
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-        "es-abstract": "^1.17.2",
-        "has-symbols": "^1.0.1",
-        "object.getownpropertydescriptors": "^2.1.0"
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-    "vendors": {
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-      "resolved": "https://registry.npmjs.org/vendors/-/vendors-1.0.4.tgz",
-      "integrity": "sha512-/juG65kTL4Cy2su4P8HjtkTxk6VmJDiOPBufWniqQ6wknac6jNiXS9vU+hO3wgusiyqWlzTbVHi0dyJqRONg3w=="
-    },
-    "whatwg-fetch": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.0.0.tgz",
-      "integrity": "sha512-9GSJUgz1D4MfyKU7KRqwOjXCXTqWdFNvEr7eUBYchQiVc744mqK/MzXPNR2WsPkmkOa4ywfg8C2n8h+13Bey1Q=="
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       "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.1.1.tgz",
diff --git a/packages/optimizer/package.json b/packages/optimizer/package.json
index 5298f90ad..1a402c951 100644
--- a/packages/optimizer/package.json
+++ b/packages/optimizer/package.json
@@ -35,7 +35,7 @@
     "@ampproject/toolbox-validator-rules": "^2.5.4",
     "abort-controller": "3.0.0",
     "cross-fetch": "3.0.5",
-    "cssnano": "4.1.10",
+    "cssnano-simple": "1.0.5",
     "dom-serializer": "1.0.1",
     "domhandler": "3.0.0",
     "domutils": "2.1.0",