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My Firefox ver 140.0.4 bookmarks have disappeared on Samsung S25+ Android 15. I thought they might be found under another profile, but Firefox profiles are not supported on Android. I can find no JSON backups either, so it appears that the automatic bookmark backups are not supported on Android either. Any suggestions will be sincerely appreciated. [I did not have Sync set up on my laptop or phone prior to this unhappy event.]

macOS 15.5, TB 141. By design, when one "Removes" a profile without deleting the data, the profile no longer appears in Profile Manager, but it is still in the profile folder. Thus, is it safe to manually delete a "removed" profile if one later decides it is not needed?

Thank you.

I am getting a lot of web client exceptions with version 141. How Can i go back to version 139. This is for my work software. I have no power to make changes to the software. If I can go back an not have automatic updates that would be great. Will I have to delete firefox and download an older version.

Hello if i enter proxy and ip address in firefox in Manual proxy configuration section then when i open a website its asks for username and password my question is can proxy owner see my data and i am using https websites like post data ?

I am on the release channel and have 139.0.2 (64bit) installed on my main computer and my laptop. Up until recently I have been able to right click on Local Folders and select "Mark All Folders Read" and all mail within all my folders are marked read. Now, however, when I click "Mark All Folders Read", I get the confirmation box "Are you sure you want to mark all messages in all folders of this account as read?" but when I click OK, the box disapears but nothing happens at all to the folders. Please help as I use this feature alot. Thank you for your time Paul Stear (appjaws)

When my computer was repaired, Windows was reinstalled but I lost various programs, including Thunderbird. I had to reinstall it. I assume my data--my email database--was not erased, but I don't know how to access it. The online help menus are not helping. How do I connect the program with my existing profile, which I assume is still on the computer somewhere?

Everytime I try to save an Image or video file, Firefox on Android just says download failed without explaining how or why.

I've tried clearing the cache. I've tried clearing download and search history. I've uninstalled and reinstalled the app.

I don't know what else to do.

I currently have NordPass as a Firefox Extension. After checking a box for "Stay Signed-in," I can no longer turn it off. Instead of any unauthorized person signing in with Firefox, I want to need my Master Password in order to sign in to websites. How do I stop this "Stay Signed-in."

Recent problem, real nasty, may just have to give up on Thunderbird, at least on the Windows 10 computer.

Click on folder name in folder list, all messages previously downloaded and viewable, when the message list appears, it instantly disappears and the message list pane displays "no message found" and it proceeds to download the entire message list all over again. For some folders with over a hundred thousand messages, this is unacceptable, obviously.

Good morning -PLEASE help - I had numerous e-mails in my inbox that went away - when I opened this am only yesterday's were in there ......I am sooooooooo IT incompetent

Thank you in advance - some very important stuff was in there.....

Hello,

After the automatic update of Thunderbird Destkop (Windows 10) to version 1.140.0 and then a manual update to 141.0, I cannot send emails using port 587 with STARTTLS (e.g., for an account hosted at smtp.office365.com).

Sending mail from other accounts via port 465 using SSL/TLS still works. Also, using an older version for Linux with the same setting for port 587 works.

Does anyone else experience a similar problem? Has there been a change in the implementation of STARTTLS?

Markus

All of my extension buttons disappeared, both from the main toolbar and from the Extensions sub-menu. They are still installed however. The only entry visible in the Extensions button, or in Manage Extension Shortcuts, is for an extension that has no button (Markdown Viewer).

This issue persists even if I switch to a known-good backup of my profile.

I am using my University of Florida email (https://www.mail.ufl.edu/), IMAP. When I turn on Thunderbird and I send messages, everything is good for a few hours. After that, when I send an email I get this error every time:

Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. You can retry or save the message locally to Local Folders/Sent-XXXX@XXX.

How can this be solved? Only way to fix is closing Thunderbird or rebooting, then problem represents itself. But then I lose the sent emails.

Note: could the problem be that by Default Thunderbird saves emails in a different sent folder? Which is not ideal, because when I send from my phone or from the web things go in a different folder than when i send from Thunderbird. Should I tick off "others"? in the attached pic? How should I consolidate the 2 "sent" folder into one? Should I manually copy them? Or after I select "others", they consolidate themself. I dont wanna do a mess, can you please provide step by step instructions.