Hello!

We fixed Twitter login promptly, soon after we learned about the problem. Note that Firefox itself ran into the same breakage.

It sounds like you told Privacy Badger to block reCAPTCHA by moving the slider for www.google.com to full blocking. Customizing slider settings is an advanced feature. I suggest leaving the sliders alone unless you know what you're doing. There are reasons why www.google.com isn't blocked by default for all Privacy Badger users, and you ran into some of them.

[Update: The Cloudflare fix is now live.] The fix for Cloudflare is going out in next Privacy Badger update. Until the fix is released, you could disable local learning as a temporary workaround. Alternatively, if you experience this problem on the same few sites, you could instead disable Privacy Badger on those sites.

I want to help you but the reviews page is not the right place for this. To get help in the future, please email extension-devs@eff.org