I'm sorry to hear that you're having trouble logging in to certain sites after the recent Firefox update. It's frustrating when things don't work as expected. To help resolve this, let's try a couple of steps. First, try clearing your browser's cache and cookies. Sometimes, outdated data can cause login issues. Also, make sure your extensions and add-ons are up to date. They can sometimes interfere with site functionality. If the problem persists, you might consider restarting Firefox in Safe Mode, which disables extensions temporarily. This can help pinpoint if an extension is causing the problem.

Hi Karl, thank you for sharing your add-ons list. It may be an incompatibility between the latest Firefox releases and the AdBlocker Ultimate extension. One of the reviews said that uninstalling and reinstalling (the add-on, I assume) can resolve it, but we are looking for people to check that or other options and report back.

• Reviews: https://addons.mozilla.org/firefox/addon/adblocker-ultimate/reviews/
• Install/Uninstall steps: https://support.adblockultimate.net/en/articles/3385527-adblocker-ultimate-for-mozilla-firefox

P.S. This site doesn't accept emailed replies, unfortunately. Please follow up here at https://support.mozilla.org/questions/1420335

Hi

I understand that we may have a fix for this problem.

1. Open AdBlocker Ultimate from the toolbar icon and select Settings.
2. Next, select the Filters tab in the page that opens and turn off the Security option.
3. Close the page and then repeat the process, but turning the Security option on.

Does this help fix the issue?