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Issue Summary: When disconnecting from a corporate Cisco AnyConnect VPN on macOS, Firefox completely loses its internet connection and throws network errors. Other browsers (Chrome, Safari, Edge) continue working perfectly on the home network. Standard troubleshooting steps—like clearing Firefox's DNS cache, changing proxy settings to "No Proxy", turning off DNS over HTTPS (DoH), and flushing system DNS—do not resolve the issue.

Root Cause: Cisco AnyConnect locks low-level socket configurations and routing rules within the active Firefox user profile (prefs.js). Even after the VPN is disconnected, Firefox remains bound to the dead corporate pipeline, a behavior that standard settings menus cannot override.

Proven Solution: The only way to clear the corrupt VPN socket locks is to completely reset the internal profile architecture:Open Firefox, type about:support into the address bar, and press Enter.Look at the top right of the page and click the "Refresh Firefox..." button. Accept the prompt. Firefox will close, securely back up your bookmarks/passwords, generate a fresh profile, and restart.Internet access will instantly return to normal. (Note: You will just need to reinstall your extensions afterward).

That tab grouping "feature" really is too much like modern software developers' tendency to roll out a new "feature" and turn it on automatically no matter how annoying some users may find it. Some times when a mouse cursor goes too far and wanders into that tab zone, Firefox starts grouping tabs. Please allow us to turn the thing off.

I'm running Thunderbird most recent version. After changing my Google password, I can no longer connect through Thunderbird to Gmail. I've tried uninstalling Thunderbird and reinstalling. I've tried deleting the Gmail acct info from Thunderbird and setting it up again. I get the pick IMAP screen, enter my new Google password, then get a Google 400 error stating "The server cannot process the request because it is malformed. It should not be retried."

Any ieas?

For some reason since reinstalling my Thunderbird every time I try to sen e-mail I get the error "Sending of the message failed. An error occurred while sending mail. The mail server responded: <SantoshS1@vbeyond.com>: Recipient address rejected: Access denied. Please check the message recipient "SantoshS1@vbeyond.com" and try again.

They are perfectly valid addresses, as they are generated using Reply. This did not happen before I was forced to reinstall from scratch. I suspect it may be some sort of issue with my account configuration in Thunderbird, as I had to recreate that.

I can't find the three horizontal bars to be able to access any menu, to enable me to import the passwords and bookmarks from chrome. If there's no simple solution to this, I will simply discard Firefox. All I find is three dots on the top corner and if I access settings there there are no options to import anything.

When I opened up my Firefox this evening, I was greeted by a message stating that I now had access to Firefox VPN with version 150. When I opened up the link showing me how to activate it, I noticed I never got a popup on my browser stating to turn it on. Later when going through the instructions it recommended I try to add it from my toolbar but it was not there either. I am not sure if this was a bug or not but I am really excited for this feature and would love to test it out as soon as possible!🫶

I just want Thunderbird to show remote images automatically without me clicking the button. Just show all images. The setting you ask me to change does not exist.

I work at a small daily newspaper chain, and our website CMS is both archaic and homebrew. I only work with it sporadically, and Firefox is the best option for maintaining it.

This morning, I got the regular "Are you sure you want to delete this?" dialog box (pretty sure it's a Javascript call) with the additional check box of "Do you want (URL) to not prompt you for this any longer?" (or words to that effect).

I thought, "Great, one less click" and made that selection.

But now when I want to delete an item off the articles list, it doesn't delete at all.

I'm pretty browser-savvy, but I don't know how to re-enable that option. Any ideas?

I have been using Thunderbird for a very long time. Today is the first time I have seen this happen.

In the column on my left side that has my account and folders for those accounts it is showing 5 in my junk account. But in the preview window to the right of that column there is nothing showing as far as any entries as junk mail. It is completely blank. What do I need to do to clear this 5 from the left column Junk folder??

I have tried resetting the machine and that did not work. I even went into the webmail site for my email provider and there is no junk email showing there at all so as far as my email provider goes, it looks like everything is working there.

Bob

what it says on the tin. went data purging with ol reliable WinDirStat and found this absolute behemoth of a file in the profiles directory for firefox. its especially weird considering the entire Firefox directory itself is only 1.5GB with this menace taking 1.3 of it. I cant imagine that bookmarks, search history, passwords, the works takes up any more than about 300mb. so im wondering if im just stuck in the early days of data or if the file really is just that girthy.

Hallo ich brauche Unterstützung,

Wie/Wo kann ich diesen Ordner Spam' in meinem Thunderbird Account '[edited]@t-online.de IMAP' entfernen/löschen? Die Pfadangabe 'imap://juergen.plenske%40t-online.de@secureimap.t-online.de/INBOX/Junk' des ersten Ordners ist falsch. Der INBOX-Ordner auf t-online heist 'Spam' und funktioniert als zweiter Ordner (unterhalb) korrekt.

Vielen dank für eine Lösung dieses Problems.

Hi, I am experiencing an issue with accessing my Amazon orders and returns when using Mozilla Firefox. While I can navigate to Amazon.com without any problems, I am now prompted to sign in to my Amazon account whenever I attempt to view my orders or returns. This pop-up indicates that it is a Firefox security issue rather than a Windows problem. This situation has only started occurring recently, and I would appreciate any assistance in resolving this matter. My Firefox version is 150.03. Thank you for your help.

I tried to add extensions on my Firefox but every time I click, it said to download Firefox. I also tried the delete and download back method and that’s doesn’t work either. Please help

Hello,

I’m experiencing a serious issue after updating Firefox to version 150. Since the update, Firefox frequently freezes and crashes, making it almost impossible to work normally.

My laptop has 16 GB of RAM, and I’m using Windows 10. When I check Task Manager, I can see that Firefox’s memory usage suddenly increases to around 7–8 GB, then drops back down to around 3–4 GB. The memory usage keeps fluctuating heavily.

Also, the number of Firefox processes/tabs in Task Manager keeps increasing, and eventually the browser becomes completely unresponsive.

Could you please investigate this issue and let me know how it can be fixed?

Thank you.