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1. 1. Steps to reproduce

Open several tabs, in settings, check «ouvrir les fenêtres et onglets précédents», quit firefox.

1. 1. 1. Expected behavior

On startup, Firefox should reopen with the same tabs before shutdown.

1. 1. 1. Actual behavior

Firefox opens with one empty tab. Forcing me to got to «history -> recently closed windows -> restore» everytime I quit Firefox or shutdown the mac.

1. 1. 1. Device & build information

• Device: MacOs Tahoe 26
• Build version: firefox 148.0.2
• First seen version: MacOs Sequoia

1. 1. 1. Notes

Fresh migration from Win 11 to Mac. tabs, passwords, bookmarks, plugins migrated from win to mac. Attachments:

What is wrong with firefox! It doesn't work right with benzworld.org a mercedes forum. Page becomes unresponsive, or when clicking a link for a thread it takes incorrect page. Other browsers don't have this problem. Saving a bookmark, it doesn't save. Uninstall, reinstall, same thing.

Firefox autofilling my freaking CC number though those settings are disabled. I want to know what Firefox file my CC number is stored in.

Give me the filename -- I'll do the rest...

I made a folder and called it April. One day the folder just disappeared. No one seems to help me recover the folder and i need it. Once I moved emails into that folder they are no longer available in my inbox. SO if you know how to recover my folder help, or if you know how to recover emails that were sent to a folder, that would work also. I use Windows 11 and I have the most recent release of Thunderbird. I use Charter.net as my isp which is pop. Thanks,Charles

During the week of March 7-13, 2026, upgrade(s) caused the size of my bookmarks, fonts and tabs to shrink to barely readable (see attachment) in the Firefox browser window on my Windows 11 PC. I've tried every internet base advice article. How do I increase the size of them?

I've been trying to move my Thunderbird data (148.0) from a Win10 to a Win11 machine. I've meticulously followed both the methods outlined at http://mzl.la/1ApHiU3. I have copied my original profiles.ini from the ...AppData\Roaming folder to that location on the new machine, then corrected the drive locations in the file (see attached profiles.ini image). (yes, the correct "j4sqsccb.XXXXXXX" folder is copied to the new installation's root: a bulky several-GB)

In order to try to replicate my original computer's admittedly-awkward installation from long ago, I have added the suffix " -p -no-remote" to the desktop icon's Target field. And on startup, the new T-bird does properly show my original profiles in the Select panel - even though I only ever used the one that functioned correctly, identified as 1 in the profiles.ini file (see Choose User Profile image, IDs X'ed-out).

However, on selecting that profile on the Win11 machine, Thunderbird just takes me to the account setup screen, as if it's unable to locate or load the account settings for that profile.

I'm only doing this clunky method of copying-over out of ignorance; I'd be very happy to simplify the mess I'd created decades ago with my original installation. OR if you think I'm better off wiping all evidence of past installations to start from a clean install, I'll be happy to do that. Please let me know if you need additional info I've failed to provide here!

Also adding images of my ...Roaming\Thunderbird\Profiles folder and Installs.ini file, just in case!

I asked AI and this is what it gave me.

Failed Handshake: Recent reports regarding Firefox Mobile version 148.0.1 suggest a regression where the browser fails to trigger the system-level pop-up for passkeys. Instead of showing you the "Use fingerprint/PIN" prompt, it either hangs indefinitely or defaults to a "Passkey required" screen that you cannot bypass. ​System Conflict: There are indications that the March 2026 Android security update may have changed how third-party browsers request "Nearby Bluetooth" permissions for passkeys, which Firefox has not yet fully adapted to.

I'm using a Pixel 10 Pro XL updated to the latest March software update and made sure Firefox mobile was up to date on the Play Store.

I use apple mail on my phone and Thunderbird on my PC and my (IMAP) email provider is GMX. I recently added a couple of sub-folders to an existing folder and changed the names of couple of others (in the same main folder). I did those changes on my phone. However, those changes are not reflected on my PC. The folders with changed names are in the folder list but greyed out but the new folders are missing. If I click on a greyed out folder it is empty. I've tried several ways to force the list to update but, so far have been unsuccessful.

What is causing my problem and how can I fix it?

Thanks for any advice.

I am shifting over to TB from Windows Live Mail. I have installed TB Ver 115.16.2 on 7 computers successfully (Win 7, 10 and 11) over the past year. But on one Win 7 computer TB will not save the password. Usually TB asks for the Password during set-up. But here it asked for it in a pop-up box. Yes, I entered the correct password. Yes, I said "save with Password manager." But here it keeps asking for it, over and over. At one point TB connected to the POP download server, just long enough to download all the incoming emails, but then quit connecting. It won't connect to the SMTP server. The port numbers for POP and SMTP are correct and the security settings are correct. I've done a lot of web searching. Most sites say that profile files logins.json and key4.db may be corrupted. I disabled them (by renaming) and copied those two files from another computer on which the same Thunderbird version works properly on the same mail server. Same thing - TB still keeps asking for the POP server password. I just deleted TB (uninstalled, and deleted all the appdata directories, and verified there were no lingering registry keys using a list shown on Spiceworks). I'll next reinstall, but don't have much confidence that it will work. Thanks.

I already have Firefox on my laptop and via Mozilla I was asked again to install Firefox. Furthermore I always got the question that I should use it as standard browser. I have no idea what else should I do in that case. If I would install again Firefox, I will lose all the paid apps which run already on the current version. So I am really very confused about the characteristics of this Firefox installation and the strange requests by Mozilla to install Firefox.

I would be delighted if you could me support with checks to find out about the nature of the current Firefox installation or a simple de- and reinstallation instruction of Firefox (and keeping the paid apps like Ad Blocker...).

Thank you in advance for your feedback

Rosemarie

My computer recently crashed, and I've only been able to partly restore it. One of the casualties seems to be access to Thunderbird (although I've just accessed this help page with the password that doesn't work with the App).

I love the browser and use it daily with Android phone and Linux laptop.

Concerning the new Android version, it is great. But please, bring back the select all tabs function. I like to save and backup my tabs by sharing them externally, and selecting them one by one is a very slow process.

Appreciate!

Importing CSV address books does not work properly. The resulting folder cannot be accessed by emails to be sent.

The imported Address Lists cannot be used in an email as a list. The error message is that the address is not a valid email address. However, if a new Address List is created with the contents of the imported file manually copied, then it can be used as an email address.

I also found that clicking on an individual address in the imported csv, will open the individual email address.

So the addresses are valid but the list is corrupted.

Since about mid january, the language of documents at my homebank, is switched from the original danish langguage, to english. With Google Chrome browser, it is still danish. See attached scree print. Left originl danish, right - strange - english. As far as I have found out, there was a SW update of Firefox late January, that could have introduced this fault. I have had contact to Homebank supporter, of course. Their first question was: Switch to danish langue. But is is, as it has been foir several years. Please help me! Also I have some other minor problems, as many homepages do not test changes with Firefox. I do not want to list it here! So I ask you to make less special SW for Firefox, otherwise you will lose many users. It is NOT OK as it is.

For the last 2-3 day I have been experiencing a box that asks for my signature each time I go to a new website. I can't move the box. I can't screenshot it. Does anyone know how I can get rid of it?

How do I search x-rated or violent content with the Firefox browser without Google safe search puritans blocking my every attempt to do so. I don't what I've done or how to change it. I am just going around in circles of frustration. Good lord it's like I'm back into the puritanical dark age. PLEASE HELP.