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My big computer seems to be shut out of thunderbirds but my phone still works now that I contacted spark my phone now no longer works as well. please re-enstate my thunder bird emails onto my big computer and my phone. I prefer thunderbirds than using the xtra.web page. thankyou for your time on this. Janine van Marrewijk.

HI All Recently purchased a laptop and want to have FF sync with my desk top. I am signed in to both devices with the same account and have checked all settings on both and they are identical. Why are they not syncing?

Background: On August 6th morning EST after the August 5 2026 update, attempting to use firefox lead to the window with the "end process" button so I had to close the browser multiple times and then the next time I opened firefox, the bookmarks and history were wiped. I was able to restore using a backup saved on the computer and continue as normal (aside from losing some Cookie Clicker progress, reinstalling Tampermonkey userscripts, and redoing browser extension settings) but now there's an issue with trying to backup firefox data.

Issue: Trying to back up my firefox data leads to a "There was a problem backing up. Try again in a few minutes."

When going to about:config and typing browser.backup.backup-debug-info, I get {"lastBackupAttempt":1786243812,"errorCode":9,"lastRunStep":13}

When looking at Broswer Console, there is an entry saying BackupService: Could not create C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini: NotAllowedError: Could not write to `C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini': failed to open file for writing (NS_ERROR_FILE_ACCESS_DENIED) BackupService.sys.mjs:4116:23 but I don't know how to address that.

I use a paid for subscription to Gemini AI. It often creates "visuals" for me apparently using JSON code. These do not show up at all. Moreover, the buttoms and other UI controls do not display well in Firefox. Is there a way to fix this?

After the most recent Firefox update all my bookmarks were scrambled. For example, when I open one marked Bank of America, I get Go Daddy. How do I restore my bookmarks to what they were before the update?

Hello! I'm working on migrating a very old version of Firefox to a newer version, and the number one thing I want to make sure stays is the logins file(s). I went to export the CSV, and the `about:logins` page is blank! Despite this, both the key and logins files are populated, and the browser still autofills in each login as if it wasn't there. To mitigate this, I tried to export the .csv of all my logins, but it doesn't actually export. I'm not sure how to check action logs with Firefox, and I would like to grab the passwords, so I can migrate properly. Any advice would be appreciated. Thank you!

TL;DR: I am dumb, but not an idiosyncratic web browser user, and it was too easy for me to accidentally permanently delete all of my browser data. Deleted profiles should be moved into system trash when deleted, not rm'd entirely.

I have never used "profiles" and somehow, after updating firefox, seemed to have created one. I have no interest in using the feature, and therefore went to delete the new profile and disable the feature. Somehow, I instead deleted the profile I had implicitly been using all along. I clicked too hastily through the warning about deleting files, because it simply did not occur to me that deleting something related to this net-new feature should clear all of my *old* data. My goal was to restore the experience I've had in firefox for years (without profiles), but because I failed to adapt to the new feature, I lost everything instead.

I apologize for maybe shouting into the void about this, but I am posting on the off chance that this will reach someone who's involved in the implementation of these features and can save some other dumb person like me from making the same dumb mistake. It's quite painful to suddenly lose years of accumulated bookmarks, extensions, history, etc. The easiest and least intrusive solution would be to always move profiles into system trash when they are deleted, and never permanently delete them.

I have used Thunderbird on a MacBook Pro Max M4 for a while now. It worked fine until starting last Monday. Ever since then, I have to go to 1&1/IONOS e-mail on the web to send e-mails or use my iPhone and blind copy myself. It’s a pain going back and forth.

1&1/IONOS tech support helped me make sure all settings for the outgoing server (smtp) were and are correct. Tests on both incoming and outgoing ports are successful in the Thunderbird settings, so I don't understand why my e-mails are not sending. I have no problem receiving e-mails on Thunderbird. This problem on outgoing e-mails applies to both text-only e-mails and e-mails with attachments. Screenshots are attached.

There is 17.9GB worth of data. Do I perhaps need to delete some of it? I archive old e-mails offline once a year, generally in January for the previous calendar year.

Thanks, Tim

So, I recently got rid of Spectrum as my internet & email provider. I have used the Archive function to archive all the emails from that account but still need to be able to access them after I remove the spectrum email account from Thunderbird. Does Archiving the emails keep them accessible or do I need to so something else. Further info, all of my emails are downloaded to thunderbird and not kept on the server, so they are physically on my computer inside thunderbird program

For the last two or three weeks, when i open a tab that I have entered the URL for, a second tab opens right next to it advertising some service or advertising something. I don't know why this started and I don't know how to get rid of it

After fixing the view problem of my email in Thunderbird (thanks for the F8 tip!), my email stopped downloading. I have no "prompt for password" checked. There isn't a primary password checked. I've confirmed the pop outgoing email is correct with the email provider (google). I can get into it without any issues and see my emails there.

I've re-entered the password for the pop outgoing email to no avail.