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The Troubleshooting Information page is blank.

Also, when I wrote this post, I got this;

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I had Firefox opened in a main windows with maybe 50 tabs of tabs I wanted to look at (documentaries, stand-up shows, stuff from work etc). I opened a second window and while navigating in the second window I mistakenly close the main. As one does, I hit Open recently closed window. Guess what? Firefox opens a window from yesterday and a few more empty ones, but not the one I just closed. Can someone help me with this?

I am currently using Firefox version 77.0 in windows 10. I noticed few things that when I try to open some of the PDFs it shows "This PDF document might not be displayed correctly" and just blank white page shows up (image included).

I use few extensions which I disabled them completely when I read PDF but still I am unable to access PDF. While same PDFs are easily readable by other browsers like Chrome or Edge.

Please let me know is it a bug or there is some settings to tweak. Thanks in advance.

I have updated to Firefox 77. I go to https://accounts.firefox.com and I met with a whole page of these symbols:

�??�YYs�H?�+lG����:?�4���,7�1z�(U?�@?ց�~�fI?C�����}@�TUy~��)}�?�q��ie?��?����BX�r��� �nQ�?����K#T�??�4j�Ѻ�<=�DѾJ_bvh=W?

I can browse web pages fine, but I cannot gain access to login to my FireFox Account. I have had to use another browser to post this as I needed to login to my Forefox Account in order to do so.

Why am I seen these symbols?

Firefox won't fully launch. It goes into process, but never comes to the foreground. I've tried everything that can be done without using Firefox (it won't open). I can see two instances of Firefox flickering in Process Explorer, and they're eating system resources without really DOING anything. I've tried: 1. Restart Windows 10, uninstall, restart, reinstall. 2. Deleting Firefox Maintenance folder in Programs (x86). Uninstall, restart, reinstall. 3. Deleting the profile folders in AppData. Uninstall, restart, reinstall. 4. Uninstall, scour registry of all traces. Restart, reinstall. 5. It works on my OTHER admin account, but not on this one.

While Firefox is doing this nothing business, I can't uninstall it with my uninstaller on THIS account, so I have to go to my other account to uninstall, and when I get back to this one, an error message is on the screen.

Firefox is currently uninstalled, so no luck at its inner workings.

I just upgraded to Firefox 77, x64, Windows 10 2004.

Firefox 76 already broke LockWise - https://support.mozilla.org/en-US/questions/1287008

Now Firefox 77 breaks 99% of all websites. (See attached screenshot.) www.example.com www.google.com www.wikipedia.org etc

Somehow, support.mozilla.org works, UNTIL I try to log in.

I've tried incognito mode, safe mode, etc. When I change charset of the page, the text displays differently, but it's still a useless mishmash.

--- BUT --- when I open developer tools, click the HTML request and click the Response tab, the HTML renders correctly there.