Cloudflare protection redirect loop

[Squall-Leonhart]

Describe the bug Browser check never succeeds.

To Reproduce Steps to reproduce the behavior:

1. Go to 'steamdb.info'

Expected behavior Brower check completes

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Version 7/10

[condoghost]

Having same problem with another website using cloudflare protection

[reallyuniquename]

Related: https://forum.palemoon.org/viewtopic.php?f=70&t=28227

[buttercookie42]

It seems like it's working again normally with the regular Waterfox user agent.

Curiously enough, it's also working if you spoof a Firefox 91 user agent, and when I tried mozregression to test old Firefox Nightlies, I got this regression range somewhere in the middle of Firefox 70, whatever that means exactly: https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=404680ad41e4e7d08aa46081a70095486f14e15f&tochange=e704e3565db9260efaa854f2916ca023b717db3c

[reallyuniquename]

-deleted-

[buttercookie42]

Additional note: The above is definitively true for steamdb.info, but the other two pages mentioned in the Palemoon thread (and others using similar paranoid Cloudflare settings?) might still be problematic. The regression range for a real Firefox still holds (i.e. things start working normally starting from Firefox 70-ish), but Waterfox still gives problems.

While I do remember seeing that Cloudflare redirect from time to time, unfortunately I cannot remember on which pages exactly, so can't experiment with other pages right now.

[decembre]

Same for me, by example if i open a CodePen (these one with a button "Open in CodePen") in another Tab from: CSS: Workaround to backdrop-filter?

I tested User agent: Windows / Firefox 83 Seems working, but not always....

Sometime, i show the Captcha, resolve it: Cloudflare verification and it open the code pen but it is not functional: It seems the good page, but the url in the address Bar don't be related to the desired CodePen but the general one (https://codepen.io).

Maybe too a Cloudflare problem. Some info here: Browser Integrity Check broken

Found it in previous posted link: Cloudflare "Checking your browser" infinite redirect on multiple sites

[reallyuniquename]

Changing useragent doesn't work for some sites. Although I can actually see JS error in the logs.

TypeError: window[(b(...) + b(...))] is undefined

And it's in that obfuscated script.

[Marsillio]

Same problem here! I'm unable to open any site that uses Cloudflare browser check!, Endless loop!!

[cicku]

This issue should be fixed now.

[Squall-Leonhart]

Yep, confirmed.

Guess it was there end after all, despite their unpaid PR guy telling us it was the browsers fault.

[cicku]

Which PR? Please let me know.

[Squall-Leonhart]

the responder here https://community.cloudflare.com/t/browser-integrity-check-broken/381029/3

[cicku]

Oh yes definitely unpaid…lol

[decembre]

Always have problem with the looping check... No solution for Waterfox Classic ?