All Products Community Forum

i have two computers. on computer 1, all is fine. on computer 2, when it restarted after an update, i got the error message -- "the bookmarks and history system will not be functional b/c one of firefox's files is in use by another application, some security software can cause this problem." this has NEVER happened before.

i found the "how to fix this problem" page, but i am completely baffled by it. what i want to know is what security software (i have avast apps) is likely to have caused this problem, and how do i fix it (i.e., what setting should i change?).

thanks for any help you can provide. i am NOT tech-savvy, this is the only time this has happened, and i've had both computers for years. they have both always had the same apps.

i have a half dozen personal group address books in thunderbird but cannot find out how to enter a new one. i spent a lot of time with my menu (tools, files, etc.) and could find nothing related to setting up a new group file. Please help...

I had to reinstall Thunderbird after a crash. Before, my inbox was split in two. The top half was the messages and the bottom half a preview of the selected message. Now I just have one long list of emails. Please can you advise how to go back to the split screen view. Many thanks.

Hello,

Since some days ago, my Kaspersky antivirus has detected trojans from emails of January 2021. It seems like Thunderbird saves a backup from old emails on our system, and these emails contain spam and trojans.

See attached image. All of our computers show same issue. And it happens with more than 50 old emails. Also I have attached the path of these emails, where the issue has been detected by Kaspersky.

How can I remove these old emails and configure Thunderbird not to save old emails backups?

Best regards, Alba

Hi

I use Thunderbird on Windows (now 11) for 16 years now. Currently I have Thunderbird version 128.1.1. I would like to share profile between Windows and Linux (Ubuntu 24.04) installations on same machine. Profile folder is in a ntfs partition accessible both from Ubuntu (automatically mounted) and Windows. I managed to edit profile.ini file to point to right profile folder. On Windows evenrything workes fine. When I try to open Thunderbird in Ubuntu I get empty folder list and no account information in configuration. In the profile folder there ale many files created with names ending with corrupted are created (like folderTree.json.XXX.corrupt). Another try to open Thunderbird ends with message that profile is already in use. Any advice? Maybe I should debug starting Thunderbird (if yes let me know how to do that).

Thanks in advance. Marcin

I would like Firefox to save my usernames for sites, but not the passwords. However, Firefox insists that I supply a password before it will save the account details, and if I supply a dummy password, then it will not let me later edit the account and delete the password. I like to remember my own passwords rather than store them anywhere.

I have tried password managers and they are overbearingly controlling, particularly given that they don't store my passwords let alone my 2FA details, so I'd rather just use Firefox's less onerous, built-in system, if only it would allow me to save an account without a password. Surely saving a username without a password is a safe option, so why block it?

On your latest email you show a dark blue colour side bar (https://www.thunderbird.net/en-US/thunderbird/128.0/whatsnew/?locale=en-US&version=128.1.1&channel=esr&oldversion=115.14.0 However I am unable to change the colour of the side bar. It keeps the old light gray colour. (See attachment) I tried to change it with a "Right-Click" on the side bar and change the colour but nothing seems to change. How do I do this? Thank you :)

bold textstarting/wanting to use Java. Java is loaded but I am having issues starting to use it. I have Java loaded and installed but ho to starting to use ????

I've installed firefox with pacman on Linux, and I installed arkenfox. It did not work, I tried other user.js', none worked. I've also tried wiping my entire firefox root folder, then using arkenfox, but did not work.

Firefox should definitely add a dedicated option in the toolbar to make switching between profiles easier. Currently, the only way to do this is through the "about:profiles" tab, which is much less convenient than the profile switching options in other browsers

The Adobe Acrobat Add-On Extension for Firefox was missing so I attempted to add it from Adobe Acrobat Pro 2017. I have had to do this manually by installing from the adobe_acrobat-1.0-windows.xpi file. This usually has worked. When i tried to add it this time is said the add-on file was corrupt.

I tried uninstalling and redownlading AdobeAcrobatPro 2017 thinking this would add an uncorrupted file and got the same the same message. Unfortunately, because I had used the Adobe license key too many times for Acrobat 2017 on my computer I had to upgrade to Adobe Acrobat Pro 2020. i had hoped this would solve the problem. But no, I get the same message corrupt file message even with a new copy of the Acrobat Pro 2020.

What is going on? Can anyone help with this?

Hi, I want to use dark background color theme in the Mozilla Firefox PDF viewer, read here https://support.mozilla.org/en-US/questions/1434510 but cannot find "userContent.css". My question is where can I find this file on a Windows 7 or Windows 10 installation?

Seemingly straightforward searches through the options like:

• "Reset firefox"
• "Clear cookies"
• "Empty cache"

None of these things pull up any results when searching the settings... Why?

I have gone to sites that already have my stored password. The saved password is not populating. I deleted the password. When I go back to the same site, it did not ask to save my password even though the option is selected is settings. This started after the recent update.

As I said in the title, the spellchecker add-on I use, LanguageTool, does not work on this site. I am not fine with that. What's the best way to get it working here? Any answers that amount to "you don't" are not acceptable.