Google sign in from Facebook entry get blocked

[swolf86]

Which area(s) of Podkrepi.bg are affected?

No response

Describe the Bug

Google sign in fails

After you click on a post from Facebook or there social medial select a sum yo donate and then click on sign in with Google you receive a an error

To Reproduce

podkrepi.bg’s request does not comply with Google’s ‘Use secure browsers’ policy. If this app has a website, you can open a web browser and try signing in from there. If you are attempting to access a wireless network, please follow these instructions.
You can also contact the developer to let them know that their app must comply with Google’s ‘Use secure browsers’ policy.
Learn more about this error
If you are a developer of podkrepi.bg, see error details.
Error 403: disallowed_useragent

Expected Behavior

Which browser are you using? (if relevant)

Facebook browser

[nikolay-yankov]

For context: https://developers.googleblog.com/en/upcoming-security-changes-to-googles-oauth-20-authorization-endpoint-in-embedded-webviews/