Firefox Community Forum

I have created a new Firefox profile. Now I want to copy my settings of the Developer Tools to this new profile. This should also include the custom device settings for the Responsive Design Mode. Is there a file (or files) in the profile-folder that contains these settings, and can I copy this file (or files) to the new profile? I found this link about copying profile files, but it doesn't mention devtools settings.

Hello,

I accidentally disliked a thought-provoking story which involved the couple who died in the Lisbon funicular crash (as of Saturday 6th September 2025), which I think was addressed by The Independent.

Is it possible to reverse the dislike? The story does not seem to appear again, at least from what I have seen. Although the dislike was accidental, I felt that having the story disliked would indicate I would not be interested in thought-provoking stories about those who have died, even though these stories should be important to show.

I have just installed firefox on my new computer. I had firefox on my old computer and laptop that are both still running. It has pulled in a list of mostly obsolete accounts and passwords which are listed when I select "passwords" I did not ask firefox to do this. why has it done this. what else may it have done that I don't know about

I stupidly chose "Remove All" from the list of cookies, etc. from my privacy settings. I can no longer play Youtube streaming, Netflix, etc.

I would like to reinstall those files that I removed.

Hi all. I recently had a terminal problem on my Win 10 computer so have bought a new Win 11 machine. I ran Firefox on the old Win 10, had 5 email accounts, had about 12 local folders and had my Profile stored in a folder on the desktop. The folder was moved there some years ago but don 't remember how I did it. I moved it there because this folder gets backed up every night.

So, I have managed to remove the HDD from my old machine and have located the 'old' profile folder. I now need to re-install Firefox on the new machine and match it up to my old profile folder (I think...)

Any advice on how to do that?

Regards

Steve

I have tried all of the recommended ideas in the articles about reloading bookmarks and nothing has worked.

Carlton Carr [edited email and phone#'s from public support forum]

Firefox Extension "Tab Session Manager" will not open saved session tabs as a GROUP

From session to session, Tab Session Manager (TSM) displays any tab I have left open when I shut down Firefox. The TSM display of tabs appears in a vertical column (left side of screen) provided by the Firefox extension, Tree Style Tabs. At any time, I have a total of perhaps 600 tabs distributed among four separate windows in TSM, with each window linked to the task bar at screen bottom, letting me choose which window to display, full-screen,

Running Windows 7 64bit SP1, I have had no problems until now displaying any of the four windows, one at a time, in the left column of my screen. Yet, now, I lost one of the windows when starting a Firefox session, and only three windows appear. Trying to recover all of the windows, since I have no menu option other than to restore the entire four window backup, I have clicked on TSM's top menu to restore all four windows. TSM does respond to my single, left-click, but restores only one window of the original four. A right-click of the TSM menu at top right of my screen makes no reference to "restore all windows in selected backup" or "restore all windows in latest saved session".

Essentially, TSM has maintained a perfect record of all TSM backups ever made, each showing date and time, but since TSM now will not restore all windows, my operations in Firefox are crippled. In past incidents when windows have been missing, I have successfully restored all windows of any backup (each backup a set of multiple windows) chosen.

My "brute force" recourse is to restore the entire Windows 7 volume from a very recent image made in the imaging application Macrium Reflect, since all the TSM windows are so valuable to my work. But that does not resolve the TSM failure to restore all of the saved tab collections.

Meantime, I have located the repository of TSM image collections, and have been able to make test backups of large numbers of tabs, and restore them properly and completely. The major problem that remains is restoring all of the tabs from multiple windows contained in the same backup, as I could before. I have tried to reach a TSM community discussion on a GitHub link, but am uncertain where to proceed next.

• BTW-- to view the entire screen, which is too small to review in the Mozilla Forum popup viewer, open the .PNG image in MS Paint.

Today I was filling in a contract with a government organization. The type that allows me to answer questions and submit. I clicked on something else before finishing and I could not retrieve my work.

I have tried ALL of the suggestions available in HISTORY (restore previous session) open closed tabs etc Etc.

Nothing works

Hi all,

Fully aware of [https://support.mozilla.org/en-US/que.../1204859], I wonder if there is any way to force a synchronization from one specific browser to others? My scenario is as follows: I use a desktop computer for daily work. This computer is bascially the source of truth. I use literally thousands of tabs, organized w/ Sideberry and multi-accounts containers (~100) (2 profiles in parallel).

From time to time, I use a laptop when commuting or working elsewhere. I'd love to instruct the laptop to receive the latest update (like a git fetch), probably after telling the main computer to "upload" (git push) the latest information and would like to make sure the laptop never can overwrite the desktop information.

Is there any way to implement such a scenario?

Thanks!

For example, say, you have 3 opened tabs in a Firefox (FF) windows. Normally, when you close FF and then re-open FF, it restores 3 previous opened tabs.

But, if you have another FF windows opened at the same time, when you close the FF windows with the 3 opened tabs and re-open back a new FF windows, FF won't restore the 3 opened tabs.

Same thing happens when you have another Private FF windows at the same time, when you close the non-Private FF with the 3 opened tabs, and then you re-open FF, it loses the 3 opened tabs.

That's why you can see 'countless' question about lost opened session, because of the issue above along with crash etc.

Is this a bug or a known feature?

suspected sessionstore.jsonlz4 corruption possible Sync rollback conflicts extremely large tab sessions spontaneous restoration of previously closed tabs during live browsing I am not a techy person. Have seen on Chat steps that can be taken, but it is too complicated for me. Seeking remote or other help. Would like to know how complex an issue this is. I'm having a very tough time. It just restored around 1,000 previously closed tabs. It takes me hours to close them because they get mixed up with the tabs presently opened. It interferes terribly with my work. I'm reaching out to IT companies and then found you through Chat GPT. Please help if possible. TY! This is a Lenovo t16 laptop with windows 11 for home or personal. I haven't had a tuneup for a long time. I read that's not a good thing to do with this issue.

Hi! I am very grateful to anyone who can help me. I re installed windows 11 on my PC and when I reinstall firefox it seems as if the firefox account info is at zeros. Reading after this problem it seems that prior to doing these full re installs firefox requires a backup process but I did not do it at the time even though sync was constantly active. Is there any way to recover all the information from the last sync prior to reinstalling windows?

Hi, I have an issue and hopefully an easy challenge, but I need and would appreciate your kind help.

My Windows 10 PC with Firefox Desktop installed has all my bookmarks, passwords, add-ons, configuration entries, etc. I had the unfortunate situation where my PC hard drive boot-up is corrupted, so I am unable to boot into windows. I am though able to access all of the files intact, via a USB Hard Drive dock to read, save, and be able to transfer any files from that non-bootable hard drive to a new install.

I did a new windows install with a brand new hard drive along with Firefox, but I need your help to effectively get all of those files/entries from the old hard drive and my Firefox "profile" transferred into the new drive so I can resume like before, and further back up as necessary. I do understand that I should have logged into my Firefox account and backed it up so it would have been seamless, but I am sorry I didn't.

Can you please help me and advise?

Thank you so very much.!

The Firefox Sync system is really neat for keeping our booksmarks synced across devices, but what I would also love to see is the option to sync all settings as well, including the changes made in the "about:config" settings.

Across my years of browsing I changed quite a lot of small little things and having to track all of those down every time I set up a new device or reinstall windows can get a bit tedious, so I was wondering if those settings can also be included in the Sync settings somehow - or if such a feature might be planned for the future?