Firefox doesn’t spell‑check in Copilot because Copilot uses a modern custom text editor that Firefox doesn’t recognize as a normal typing area. Since Firefox never turns its spell‑checker on in this kind of editor, nothing actually fails, so there’s no error code or message. The spell‑checker engine simply never activates. For this to work, Firefox would need to update its spell‑checker so it can handle newer web‑based editors instead of only traditional text boxes.

All emails in my trash folder disappeared. I do not know if this is due to something I did, or some other reason. Is there any way to restore the deleted emails?

I am attempting to locate the "manage containers" option on the container drop down menu but it is not there. I have read several other threads and have tried cntrl+ about:config "which did not have a false option" clicking right, and then maybe left and every which way I could click, but nothing. The drop down menu does not move so as to reposition and possibly find what I can't find. I do have my scaling pretty high, I wonder if that could be the problem. Any help would be appreciated, you know how we like to change these kinds of options.

Regarding the new built in Firefox VPN. If I have Tabs open and Enable the VPN on a New Tab, does it then affect all previously opened Tabs, only the New Tab, only the New Tab and Tabs opened after that initial New Tab, or ? Also, is there a Meter Display or similar so I know how much of the 50GB VPN allotment has been used or is remaining ? Thank you, very kindly ...-- J V

Setup: macOS Tahoe (26.4) and Firefox 149.0

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Behavior: Out of the blue this morning, every website I try to visit in Firefox returns "Looks like there’s a problem with this site". Every other browser works fine.

Things I've tried, that haven't fixed it: - Ruled Out DNS: Sites like 1.1.1.1 and my home router's IP return the same issue in Firefox, but also resolve in any other browser. - Firefox Safe Mode: no fix - Deleted All Settings, Reinstalled Fresh: - Removed the Firefox App, deleted:

       - ~/Library/Application\ Support/Firefox
       - ~/Library/Caches/Mozilla
       - ~/Library/Caches/Firefox

...and then downloaded and installed 149.0 fresh. - Refreshed Firefox (via [link] - about:preferences (toggled between FALSE and TRUE, testing each time) via this YouTube video

- network.dns.disableIPv6

- network.dns.disablePrefetch
- network.dns.disablePrefetchFromHTTPS
- network.dns.disable

....and in desperation, I checked my Mac for Malware (clean)

I'm at a complete loss: every other browser works, but Firefox is a 100% fail for all websites. Any thoughts?

I did receive an answer for my previous question. Thank you. However, I don't see an exit option when I tap the three dots in Chrome. I'm using the Android version and I don't see a way to exit Chrome except by closing the app. Would that work?

Issue: Critical Rendering Failure and Script Latency on Polybuzz.ai I am reporting a consistent issue where modern AI platforms, specifically Polybuzz.ai, fail to function correctly on Firefox (both Android and Linux). Despite being a loyal user since 2004, the current performance gap compared to Chromium browsers is making daily tasks impossible. Core Technical Problems: Layout Corruption: Even in Desktop Mode, the UI breaks, elements overlap, and CSS grids do not render properly. High Input Lag: Massive delays in JavaScript execution, causing the browser to become unresponsive during site interaction. Engine-Level Issues: The problem persists on both Android (latest stable) and Linux (Zorin OS/Linux Mint), suggesting a fundamental issue with the Gecko engine's handling of heavy AI frameworks. Troubleshooting Done: Tested with Enhanced Tracking Protection both ON (Standard) and OFF. Cleared all site data and cache. Verified that the same site runs smoothly on Chromium-based browsers on the same network/device. Please investigate Gecko’s compatibility with these modern web standards. Screenshots of the broken UI are attached for reference.

I set the bookmarks toolbar to show in new tabs only. If I then press Ctrl-Shift-B in any tab I lose the functionality of having the toolbar show exclusively in new tabs. It either shows in all tabs or in none, depending on the number of times I press Ctrl-Shift-B.

When transferring Thunderbird Profile between PCs passwords are not transferred. Transferring Profiles between two Windows 11 PCs ( both are the same version ) the email details are transferred but no passwords are. I followed the instructions found on the forums to transfer profile between PCs

Starting yesterday, Thunderbird will not let me delete all the junk from my Junk folder. When I right click on it and select Delete, T-bird freezes with NotResponding and I have to restart it. Once I went through and used Delete on the individual files within the Junk Folder. When I restarted T-bird, it had moved all those files to my Inbox - several thousand of them.

Can I simply delete the Junk file at \AppData\Roaming\Thunderbird\Profiles\hxza0a1k.default-release\Mail\mail.aircraftdesign.com? Or would that kill the whole thing?

Any other workaround? I spent 4 hours talking to Network Solutions, they checked all my account settings and said it is all correct.

Firefox has been my browser of choice for well over 20 years. I have a game I play every day (from FaceBook) just this week when I try to go to it on my laptop - it says your browser does not support WebGL. it has always opened using Firefox - this is a new error message. and the computer is only 5 months old and has Windows 11 on it. I do not want to switch to Google or Edge.

Like I said - opening the app worked every day up until about a week ago. What gives?

I get scam messages that say "Trojan virus detected!" on Mozilla Firefox which I cannot delete. I have run antivirus scans which show there is no virus or malware. I have shut down the desk top. How can I go to reinstall Mozilla Firefox default settings or do you have another solution?

Locking this thread, please continue here: [/questions/1576950]
How do I import passwords from DuckDuckGo to Firefox