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Having moved Thunderbird from Drive C: to Drive D:, space saving, and with everything working very well I note that my Address Book is still on Drive C:. Please advise how to move this to Drive D:. Happy New Year, and apologies for the timing of this question.

I run Thunderbird on a PC, and, to free up space on Drive C:, I have moved the contents of the folder Thunderbird in Appdata to Drive D:. I then changed my Server Settings, in Thunderbird, from C: to D:, and note that any new mail is indeed now appearing there along with those already transferred. This move could save me a valuable 6 gig of space, and more in the future, however, I am unable to remove that original Thunderbird folder entirely, notably I am unable to remove the contents of the Profiles folder, as it is still linked to the application. Notably with cookies.sqlite, cookies.sqlite-shm, store.json, mozlz4, aborted-session-ping and many others, which I note some have continued to be updated. I have been unable to find any other settings in Thunderbird referring to Drive C:, other than those in Server Settings.

I could presume that if I installed another version of Thunderbird on Drive D: and maybe moved those existing contents of the Thunderbird folder on C: onto Drive D:, and made those numerous settings changes to the App it could work. But I ask is there an easier way to complete this move? How can I complete this transition of Thunderbird from Drive C: to Drive D:?

I updated my desktop browser today and now there is an expandable sidebar at the left margin of the window showing tool icons for Tabs from other devices, History and Customize sidebar. I can see how to remove tool icons and how to expand or collapse sidebar but can I remove the sidebar completely? Is this an option? I prefer the old look with the browser web page content extending all the way to the left of the screen, without the narrow vertical sidebar.

After updating to v132 I have noticed a significant increase in the load times for some websites that our users connect to. Using v131.0.3 I usually see < 1 second load times for the two websites I am monitoring but after upgrading to v132 it is consistently taking 18-19 seconds for the same page. I have tried uninstalling v132 and reverting to v131 and it immediately goes back to the much faster load times. I have also tried installing various v133 releases and I see the same performance issue as for v132.

The environment I am working in is behind a network firewall with relatively restrictive internet access and I am wondering whether there are sites that Firefox is trying to connect to for the new anti-tracking or suspicious activity features (or anything else) that are being blocked and are therefore causing timeouts and retries that are bumping the total load time up.

Can anyone think of anything else I could check or change?

The other day I accidentally pressed a keystroke that changed a Firefox setting, and now it thinks I'm on a mobile device/displays sites in mobile view where possible by default. This has persisted despite restarts of the browser and the computer and has been happening since Sunday (Australian time). I've tried opening the Responsive Design dev tool and I've sent screenshots to a techsavvy friend (I'm totally blind and use a screen-reader, so couldn't tell this was happening until I tried to use a site that had a radically different layout in mobile view), and aside from not seeing an exit button or a switch to change device mode, he couldn't tell what was going on.

I'm stuck and need help! I would like to unmobile my Firefox!

Hi Everybody All of my folders in Thunderbird have become subfolders, which is annoying, but worst than that, most of them don't have messages in them any more. What have I done, how can I undo it and find those messages? I hope someone can help. thanks Rose

Hello. In the past two days I lose my tabs when I shut down Firefox. I used to be fine using the X at the top right and when I restarted the browser, all my tabs would still be there. Then they started going missing, so I started using the menu option to exit the browser. The tabs still went missing.

Then I noticed the square icon button on the extreme left and have discovered that Firefox has different windows, and that one of them (see attached image) has all my tabs in it, while the current window does not.

I cannot change Window 2 to be the current window. There is no obvious function on the page, nothing in settings and google is useless - I just get pages of discussion of how to tab between different apps on the desktop.

How do I make Window 2 the current window? See image.

Thank you

I updated to version 133 today and was confronted with the vertical tab bar. I did not ask for this or want it, and now I can't get rid of the side bar, in fact I seem to have just made it worse / wider. How can I get rid of this (and block it) It is just taling up space on my screen. Please help.

Whenever I open a message from the inbox into its own window, the message text and images are tiny and unreadable until I zoom (Shift-Cmd-+) them larger. And when I reply to a message, the text is also starts out tiny, but gets larger when I Zoom it up with the original message. Similarly, the column-header icons of the inbox are tiny, while the text is OK.

All the rest of the interface is normal and readable, except for the tiny text and buttons in the interface-command/confirmation boxes.

I have experimented with the suggestions in these question-replies, but to no avail:

https://support.mozilla.org/en-US/questions/1474665

https://support.mozilla.org/en-US/questions/1480963

I can adjust the font size and density from the "hamburger menu", just fine. And the MacOS 15.3.n-on-Intel settings seem right.

What am I missing? What else is there to change?

Thanks in advance... Alexander, long-time T'bird user

I want to delete all my bookmarks at once -- I have nearly 1,500. I already asked this question and the response I got showed me how to do this by selecting each one at a time. I want to delete them all, AT ONCE!

Not selecting each one and holding down the CTRL key.

Btw, I already explained this ... so, is there a way. I've tried uninstalling and reinstalling and not keeping the former settings. But the stupid bookmarks keep coming back!

Hello,

Recently I opened Thunderbird and it automatically added the following folders to my account:

https://www.imagebam.com/view/MEX6LYC

All the generic yellow folders below the Deleted trash can icon suddenly appeared and they weren't there or weren't shown before. I right-mouse clicked on the account folder, went to Subscribe, unticked the folders that I don't want to subscribe to (all the yellow ones were there), restarted Thunderbird and they all still appeared and the boxes I unchecked, had just rechecked themselves.

I don't want them shown. Is there anyway to fix this?

Thanks

I prefer the tabs be below the bookmark bar, and successfully modified the CSS file to do this some time back. Now update 133 has once again pushed them up below the menu bar. What do I have to do to get them back where I want them this time? And why can't you just leave the tab location preference alone when doing updates?

Running Thunderbird 136.0 (current as of 14 March 2025) on Windows 11 machine. E-mail account is hosted on office365 and has a personal (i.e., myname@mydomain.com) SMTP error " Connection to server outlook.office365.com timed out" Parameters were set per recent article on thunderbird forum for office365.

Using Tbird 78.14.0 (64 bit) with Windows 10. I can no longer access the Page Setup screen properly. I suspect it's because I accidentally put a very big value in for the top margin. The print preview for even a short email says it's many pages, there's no text visible on any of those pages, the only part of the Page Setup screen visible is OK and Cancel at the bottom, and I can't get to the top of the screen. I've tried closing and re-opening Tbird to no avail. How can I get to the top of the Page Setup screen to fix the problem?

I haven't upgraded browser versions for a while and I'm now going from 109 to 132. Pretty bad I know.

I'm having a number of issues but for this post I'd like to concentrate on userChrome.css.

In version 109, I had a custom font for the top menu bar, the top menus, the bookmark toolbar, the bookmark toolbar menus, and the right click menus. I did this by including the following in userChrome.css (as per [https://support.mozilla.org/si/questi.../1335097|here]:

1. navigator-toolbox { font-family:"MyFont" !important }

This worked great, but it is no longer working in version 132. Obviously I don't know in which Firefox version this stopped working.

Has this been disabled by Mozilla or has it been changed? If it's been changed, how can I achieve it now?

I'm very grateful for any help!

My page throws errors in Firefox Nightly such as

Expected color but found ‘undefined’. Error in parsing value for ‘background-color’. Declaration dropped. preview.htm:1:1

and

Expected color but found ‘undefined’. Error in parsing value for ‘color’. Declaration dropped. preview.htm:1:1

The page references ten CSS files besides having dozens of its own CSS declarations. The issue is tha the reference provided to the error (:1:1) does not indicate where I can find the error. That is, I don't know which declaration is at fault. Is there some straighforward way to find the declaration in question?

Before the last update, when you assigned a colored label to the message (e.g., work, important, etc.), the entire title, header of the message, took the chosen color. Now you only see a small tag.

'The previous system was definitely more practical. Can it be reactivated?

One of the things I heavily rely on with FireFox is it storing words I type in reply boxes on various forums. Lately however, Firefox only seems to keep them for several hours, then they disappear. For example, I can type in "K Frame." (See image attached) The next time I go to use that field again, that text will automatically appear. And it may continue to do so for several hours, even if I close out Firefox and return later, but eventually, within 24 hours, it will disappear and I will have to retype it again the nest time I want to use that phrase. FireFox used to hold these words or phrases forever.

Any suggestions????? Both my Windows 11 and Firefox are up to date.

Hallo und guten Tag,

ich habe für Windows [PC] und Android [Pixel 8pro] jeweils die beiden aktuellsten Versionen von 'Thunderbird x64'und 'Thunderbird: Free Your Inbox' installiert und eingerichtet. Es sind zwei E-Mail-Konten mit jeweils einer Alias-Adresse eingerichtet, alles unter GMX.NET , IMAP+SMTP sind ebenfalls aktiviert [IMAP port993 und SMTP port465]. Leider bekomme ich es nicht so eingerichtet, daß Mails wenn sie am PC oder am Pixel empfangen und verschoben oder gelöscht oder als Spam markiert sind, daß dieses dann auch am jeweils anderen Endgerät so erscheint. Es werden immer wieder alle Mails neu als eingegangene Nachrichten gezeigt und ich muß dann am jeweils anderen Endgerät die gleichen Aktionen vornehmen.

Wo liegt der Fehler, was muß ich tun um das Problem zu beheben.