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I run normal firefox on linux. Fully up-to-date. Every time I quit the app, it reverts to a version of my profile from a month ago, and loads all the tabs I had open then, and then receives all the tabs that I sent to the device in the interim (~1 month). As I speak, it just caught the 60 or 70 tabs in this window.

I tried changing the name of my profile folder to randomstring.defaultOLD and changed one of the backups to randomstring.default. This didn't change the behavior. I'm still stuck in the loop. I saved my tabs with onetab, because firefox isn't remembering my session anymore. I thought it was something to do with updates, like it only loses its mind upon updates, but that's not true. It thinks it's updating firefox EVERY TIME, because the one time it's loading to 1 month ago it was updating, but I'm 100% sure there are no updates to firefox in my linux. It's just hallucinating.

The articles on restoring from backup are outdated. They say to use an html file. There is no html file. It's just folders for profiles, not html files. HELP!

Hi I tried to google this but as you can guess that was a exercise in futility.

So I installed thunderbird via flatpac as suggested by the main website

I went to account add a account entered my email and password.

Clicked continue twice setup filled in the info and got a error saying

Authentication error.

Unable to log in at server. Probably wrong configuration, username or password.

now i know both are correct as i logged in vai firefox and checked both excepted.

pic below best i can do dam thing wont let me set window size so it got cropped hopefully gives info needed

so I tried to google the settings of incoming and outgoing 4 out of 5 pages i found where set as the pc has set it.

at a loss now guys no clue what to do any help would be appreciated.

ty in advance.

For a few days I'm having trouble with Asana mails (notification mails informing me about replies, comments, etc).

Clicking on the mail to view it freezes Thunderbird for a good 5 seconds while one CPU core spins at 100%. This only happens with Asana mails (or at least I haven't found any other problematic senders).

I guess it's a problem with validation or parsing of the mail's HTML content. But I don't know how to debug this.

I can't pinpoint exactly when it started happening, but it was around the time I've switched to the [new snap release track](https://support.mozilla.org/en-US/kb/channel-choices-thunderbird-snap-and-flatpak#w_snap-channel-changes-in-2026). But since this happens with Snap and Flatpak I think the culprit may be the 153.0 update.

Things I've tried:

• Clearing cache and msf files.
• Troubleshooting mode with add-ons disabled.
• Reinstallation. Creating new profile + importing old data.
• Switching from Snap to Flatpak
• Switching Message Body display to Plan Text or Simple HTML.
• Disabling HW acceleration.
• Checking console for suspicious output.

Anything I can do to create handle the problem or collect information for a proper bug report?

I have webpage (Home Assistant instance) on my local network on which I would like to use microphone (for Assistant functionality). Page is completely local, i.e. not visible from Internet. My issue is I can't force Firefox to allow microphone access on this page. I've tried messing with media.devices.insecure.enabled config, but it didn't help. Is there any way to add such page to some whitelist to allow microphone access? From what I gathered Chromium-based browser provides "--unsafely-treat-insecure-origin-as-secure=..." option but I didn't find anything similar for Firefox. I know I could expose my server to outside network and get SSL certificate (from Lets Encrypt) to make it work, but exposing server to Internet just to get local microphone access somehow doesn't feel like a more secure solution. I could probably also issue self-singed certificate but dealing with that also seems at least annoying.

Hello, When I open Thunderbird, I get redirect on the browser to sign in into my Yahoo account. I enter my logins and a pop-up window opens and says that there is no application able to open whatever it wants to open. I already checked the forums concerning the Oauth2 login security for Yahoo, and tried several of the advices, but I always get stuck at the same stage. My operating system is Ubuntu 24.04.4 LTS Thunderbird version 153.0 Am I missing an application? Or is something wrong with my settings? Thanks for any support.

I just recently installed the VPN on Firefox. It hadn't shown up because of my privacy settings. It works fine except for the United States connection. When I choose the other countries, it works fine, but when I choose United States, it still shows Japan (where I live). It still shows Japan, but it does have an effect. It changes it to Tokyo, where I don't live. So, the vpn is having some effect, but it is just not connecting to the United States. Why is that?

I have st installed Lime on my old Asus Zenbook an have installed Nord VPN. I am using the Firefox browser showing connected to the internet but am unable to access my webmail account and its popping up messges advising Problem loading webpage and another showing 502 Bad gateway. I am also having problem with the Zenbooks Keyboard with keys randomly not operating when pressed but will work after a prolonged or multi pressing.

hello: for several weeks, each time I tried to add another account back to Thunderbird, MS asked for the verification, and after I added it to link to their server, it kept telling me, "Help us beat the robot," and nothing else happened; the screen stayed blank. I am unable to see any further command. If it is being done using Windows, often you may see holding down the space bar or solving a puzzle to gain access. When it comes to Linux, I ran into this issue.

This is strange! Maybe it is trying to stop me from using this account on this platform to get all my mail here. I've been using it here for many years and no issues. Please see the attached. Please look into this. Thank you....

I have 3 different email accounts. My calendar was associated with the main account. Now for some reason it is associated with the second account. It is also not showing on the day/date calendar area, but does show on the event area of the calendar. It is associated with the second of my accounts, not the first.

Any ideas?