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As of the latest update, the attachment toolbar button in a new mail window does....nothing. Nada. Click it, nothing. I have to drag the attachments from (say) Desktop to the new message window. Works, but...so should the toolbar buttons, which used to.

Tried turning off all addons (i.e., troubleshooting mode) - made no difference.

Hi, since the latest update, whenever I'm in a tab (e.g. email or personal website) and I go to upload files, all tabs show the last location of the last upload from any tab whereas previously they showed the location of the relevant tab. E.g. on a tab for my website it would previously open the location of my website files and if I switch to my email tab it would open the location of my email attachments. Now it doesn't seem to remember the loaction by individual tab it just starts in the location of the used loaction across all tabs.

Not sure if that makes sense, it's very annoying as I have to keep searching the location again between tabs.

Can this be changed back please so it remembers locations on a individual tab basis and not globally?

Thanks

This email problem is due to a pop-up message in upper left hand corner of screen that shows a pencil followed by the words "Write"=: (no subject) - Thunderbird" with a number of clickable and unclickable options listed below, none of which lead to any access to writing a new email? I booted my system twice and that made no difference. Also when I explored the options listed in the upper left corner of the screen, an old email address came up, which I no longer use more than 10 years ago but have never been able to delete from my system's memory.

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?

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.

Moderator Notes:

• need a performance profile https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance

MacOS Tahoe 26.7.1 Firefox Ver 157.0 My download preferences are ignored and downloads go directly to download folder without asking. All downloads have a .part extension even after download is complete. I tried trouble shooting mode and then added a new profile but the problem happens in all instances.

I'm running Firefox 157.0 on MacOS Tahoe 26.6.2. The same lack of result occurs in all websites. I restarted the computer (several times), reinstalled Firefox, tested in troubleshoot mode, checked download settings, deleted history, blah, blah, blah. Nothing has worked, except to skip Save Image As... and switch to drag-and-drop.

Why would this suddenly happen after decades and thousands of successful uses of Save Image As...?

What other options do I have to restore Save Image As...?

Have tried all recommended fixes to enable usual Lottery sign in but no joy unless I do it in a private window. All cookies/racking/extensions etc. looked at but no joy. Only happened in last 2 weeks as have always managed to log in via usual window for years. Do not want to blow all history etc. away via Firefox as re-sets so many stats on sights I use so do this via CCleaner. At the National Lottery log in page detail is all there but the actual log in button greyed out. As I say can log in via Iphone or private window or using Edge so issue is with Firefox settings suddenly.

Thunderbird locked up. Followed forum advice to reload Thunderbird. Identified legacy abook.sqlite and history.sqlite files but these will not import to reloaded Thunderbird. Confirmed these files are not read only. Any advice much appreciated..

I have 5 email addresses on my Thunderbird set up. I want to change the order in which they appear so that the addresses I use most frequently appear at the top. I have tried drag and drop and that does not work and I cannot find a relevant article searching on Support. Any ideas please?

Ever since the last update 157 when i open a conversation it open every single tab in that conversation and i hate that, cause i have to close every one to go to another email. this stupid updating thing is for the birds. Another thing that i really liked in past versions that whatever color tag i wanted to use would color the subject line now it just does a little symbol all the way on the right side. Can i uninstall a update by chance?

I downgraded to Firefox 140ESR yesterday to get rid of the silly circles and gradients. The update was so visually distracting I found the browser to be unusable. However, now almost any website I visit gives me a Gah your tab just crashed. Is there a way to fix this while staying on 140ESR? Please refrain from answering if your solution is to upgrade. Thanks.

Hello. I have had a lavender color on the upperband for two days and i can't seem to remove it for a neutral color like before. Do you have the trick  ? Thank you in advance for your help. Jean-Marc

Firefox just updated to version 157.0 and now all of my bookmarks are gone. I export my bookmarks but even when I go to Manage my Bookmarks and try to import the file I saved, clicking Browse button doesn't do anything. What happened to my bookmarks?

After a while bookmarks disappear from the browser tab and the only way to recover is to close the browser and open a new page that requires signing out of opened sites and starting over. Just started with new update release.