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After the update to version 158.0 it opens and shortly afterwards freezes. i have opened in troubleshooting mode, uninstalled the app, disabled antivirus and deleted the msf files.

Nothing solves the problem.

Hi everyone! 👋

How can I troubleshoot common issues in Mozilla Firefox, such as slow browsing, pages not loading, or extensions causing problems? What are the best steps to improve browser performance?

Any tips or solutions would be greatly appreciated. Thanks! 😊

Each time I power up my laptop I want my page to go straight to my Yahoo Mail. It does do that but it also tries to open another page that errors out. I think its because there's a 'c in the address and the file can't be found. I don't know how that filename got written into the Start Up Program and I can't find it to remove it. Please tell me like a First Grader how to remove this error message.

http://"c/Program%20Files/Mozilla%20Firefox/firefox.exe%22%20-new-window%20https://mail.yahoo.com/

It says it cannot open the page.

Thank you for any help you can offer.

[redacted email from public]

This is actually the same in Firefox, and both only since today, working fine before:

Typing Ctrl-C does nothing, Ctrl-X deletes whatever is selected, but it does not end up in the clipboard. In fact, if the clipboard contains something, it will be removed (Win-V still shows it, but it can no longer be pasted). When copying from somewhere else, pasting with Ctrl-V works.

AFAICT, no issues with any other programs.

Latest versions of FF (151.0.2) and Thunderbird (151.0.1), on Windows 10.

What could be wrong?

Thanks, Ralf

Microsoft seems to have interfered with my computer. I have been using it for 10 years using Mozilla Firefox with no problems. Now all my own documents have been frozen and I am unable to make any alterations or continuation of text. I am desperately worried. I am 83 years old and started using computers relatively late in life. I am a complete 'generational novice'. It seems as if Microsoft has had some input. Please help

Please provide contact information (phone number).. I need to talk to a real, live human being. Your articles and references are not understandable to me. Please help me restore Thunderbird e-mail function and service. Thanks you.

(PII redacted by moderator)

Your current build of firefox runs substantially worse for me than previous versions. I use Firefox because it is non-chromium, which typically offers more user freedom and control, but these new performance settings which cannot be edited individually, but are controlled automatically, are overstepping. Please advise how I can change the settings on a deeper level than simply switching off hardware acceleration. I'd like to limit multiprocessing primarily, but I would also like to have access to other performance settings. Further, I would like to have more control over how Firefox can access my devices. Please advise how I can access and edit the full list of permissions available to Firefox. I ask for this in the interest of transparency and personal data protection.

what have you done with the? "new" firefox since the last update and change, it crashes, it won't open websites and now it said prove you're not a robot and other miscellaneous things are going on? Can I go back one update? I dislike what you have done. Firefox has always been my first choice and not Chrome, I'm going to have to find another search engine.

I believe with Update 154,0 my thunderbird has been freezing up. I can't see, to compress files or select some folders. After a few minutes everything freezes up. 21 AUGUST 2026

[redacted] @gmail.com

/edit: unlocked as other was made as duplicate.

New user of the Mozilla VPN for MacOS 26 (soon to be 27). I have two questions: 1) how can I exclude a website from the VPN? The Roku website, accessed via Safari, does not work with the VPN installed and enabled. The only instructions that I have been able to find use a Firefox extension that only works on Windows. 2) When I turn off the VPN, or quit it, I lose internet access. I have to uninstall the VPN client (I use AppCleaner) to effectively disable it and maintain internet access. How can I temporarily disable or quite the VPN and maintain internet access? Thanks !!