Firefox Community Forum

On the about:sync page the button to "Export to File..." button has no effect. Regardless if I select "Limit history engine fetch to first 5000 records" or "Anonymize Data".

It used to work. So I wonder why nothing happens when I click the button now... There is no network call made when I click the button. No error.

Hello, I am currently using Firefox Beta and I would like to switch to the regular Firefox Release without losing any of my data (browsing history, bookmarks, passwords, add-ons, and settings). I would appreciate guidance on the safest recommended method. Specifically:

Is it safe to install the Release version over Firefox Beta, or could this cause data loss or profile conflicts?

What is the best way to create a full backup of my Firefox profile beforehand?

Should I expect any issues with add-ons after moving from Beta to Release?

Do you recommend enabling Firefox Sync as an additional safeguard, or is a profile backup enough?

In case something goes wrong, what are the recommended recovery steps?

My setup:

Operating System: [windows 10 ]

Thank you for your assistance.

Hi all,

I'm using Firefox 125.0 (64-bit) on Fedora and for file downloads, I have the options "Ask whether to open or save files" and "Always ask you where to save files" enabled.

This basically works, Firefox opens a file selection dialog and I can select where I want to save my downloads - so far, so good.

The weird thing is, the default location that is shown in this dialog seems to change every time I download a file. I would expect to see the last download location as the default option, but that is not what happens.

When I check about:config, I can see the last used download path is saved as browser.download.lastDir perfectly fine, but it is not set as the default for the next download.

Is there a parameter I can set so this last path is used again?

Thanks,

M.

My wife's Firefox was triggered from an e-mail link and in the process got updated to release 141.0 The result is that the tabs from the previous verion have not loaded. Can I still recover them?

When signing in to websites, firefox offers e-mail address options that havebeen used before on that site. But right now it keeps offering two, one of which is incorrect, and I thought there was a way to fix that, but right now I cannot remember it.

This is explicitly for sites where I have told firefox *not* to save the password, and it is offering up potential email/login. entries *only*.

I do not want to tell firefox to not offer to autofill anything ever, because that saves time when the entries are correct. but here they are *not* correct and I need to clear them for this one specific website.

How do I do that?

In English, the meaning of this error is: Title: Configuration error Content: Failed to read configuration file. Please contact your system administrator.

I had this error for a long time. But it's not too serious. Just hit ok and I can use all the recovery tabs as before without any problems. But every time I open windows and open the browser, this message appears. I feel very uncomfortable and tired without knowing why. Even reinstalling the browser didn't fix the problem, I tried it before and lost my favorite browser theme. And 1 more thing if someone can explain. If it can't read the configuration file, how can I still use the browser? What does that configuration file do?

This message only appears when I have not opened the Firefox browser on my computer. If I already have the tab, I can open another firefox browser without that message appearing. Only when I close all tabs. Open it again and it will appear. And click ok to use normally.

It's a bit weird, I got the thing you get when you migrate to a new browser - asking if you'd like to migrate history and bookmarks. I closed it because I've used Firefox for years.

When Firefox opened proper, I got a tab asking to restore the previous session, along with a "Welcome to Firefox" tab. As well I got a few popups for other things, basically just stuff you see when you open Firefox for the first time. A couple of extensions opened up a landing page that should only open when you first install them.

All my bookmarks and browser history is there. The settings have all been reset to default. The extensions are there but all of their storage seems to be gone, like my dark reader extension no longer has the exception sites on it. Ublock has the ad count reset and most importantly all my custom rules are gone! I have spent years making hundreds of custom rules, and quite a few took hours to get right. I am sad about losing that.

Does anyone know what might have happened?

When I was looking at my about:config to see I saw these things in the modified settings.

there's quite a few settings here and IDK which are relevant. The ones in the pictures where just the first couple and I show them because they seem to have something to do with this situation "auto migrated" - when it seems like the browser did this because it thinks it migrated, the first screen I got was asking if I'd like to transfer my bookmarks and history (and good thing I closed it,or it might have deleted those too).

Hi everyone, I've been experiencing a persistent issue where my Firefox (Windows 10) randomly crashes or closes. I recently noticed that this always happens when a JSON file appears in the following directory: C:\Program Files\Mozilla Firefox\distribution The strange thing is that this file shouldn't even be there, as this is my personal computer and it is not managed by any organization. I have already tried deleting or renaming the file, but after a seemingly random period, it gets recreated automatically. Here’s what I have tried so far, without success: - Deleting/renaming the file - Checking the registry at HKEY_LOCAL_MACHINE\Software\Policies\Mozilla\Firefox (but the "Mozilla" folder does not exist there) - I have never used any third-party antivirus software (only Windows Defender) Does anyone have an idea where this file might be coming from or how I can prevent it from being recreated? I’m not very tech-savvy, so I would greatly appreciate simple explanations or step-by-step instructions. Thanks in advance for any help!

Sorry for my language.

The latest versions of Firefox 141 (and 142 beta 1) do not allow the Windows taskbar to appear when I move the mouse to the bottom of the screen. This happens on Windows 10 with the auto-hide taskbar setting enabled. In previous Firefox versions, this worked fine (except for one older version where it briefly broke). I’m not running Firefox in fullscreen mode, and I have no modifications or themes that could interfere. I tested this on a fresh, clean installation of Firefox — the issue still occurs. After downgrading to versions 140 and 139, everything works correctly again. Interestingly, I also tested the Firefox 141 Release Candidate Build 1 from here: 🔗 https://ftp.mozilla.org/pub/firefox/candidates/141.0-candidates/ In that version, the issue only occurred in private browsing mode. Could someone please help me resolve this or confirm it as a bug? Thanks in advance!

Why Firefox lacks having right click option (context menu) for multiple search engines like Chrome (Chromium browsers) and Edge has somewhat "Chrome-like omnibar in Mozilla Firefox"?

If I am using a certain search engine as default but don't use it all the time or want to use another without changing the default search engine or want to search a term or sentence via any search engine, then Firefox has no such option or addons (yes, checked thoroughly for latter).

Opera has from day one, Vivaldi also has it, Chrome allows it via extensions, Edge does via addons, Brave as chrome does via addons, Naver Whale (South Korean browser, underrated, seriously) has options to put more than 1 search engine for search results.

Adding images below for reference.

Why Firefox is seriously so old and outdated and nowhere close to standards of 2024 and 2025?

Somebody made a post 10 years ago around 2014 🤯🤯🤯 and Firefox, as usual went their way as they are doing now.

https://connect.mozilla.org/t5/ideas/why-firefox-lacks-having-right-click-option-context-menu-for/idi-p/81175

https://superuser.com/questions/776139/chrome-like-omnibar-in-mozilla-firefox

https://www.reddit.com/r/firefox/comments/vpffu/can_i_get_something_like_chromes_omnibar_for_ff/?rdt=48216

https://chromewebstore.google.com/detail/search-with-duckduckgo/amkahembcklobdkoaaepgfpmdnobmdkh

https://chromewebstore.google.com/detail/Brave%20Search/jojedekgcncccnjhilimdojbfnfamkda

https://chromewebstore.google.com/detail/duckduckgo-search-context/fepjgbgflmnaieiodmkkclhjfihdhoid

I just accidentally deleted a day of history, now it has to relearn a bunch of stuff.

Please add support for undo, so that if you do it by accident, you can reverse it.

I'm making a barcode app. When I'm trying to print it the preview just shows a black rectangle on my barcode. My barcode is an svg The code basically adds that svg to an empty print window.

Hello: FF dev 150b5,w11p. With this v 150 there's a new irritant that I would like to stop, please. That's the sudden (starting w/v150 again) appearance on lower L corner, of a popup window, which may be interactive. That is, this thing is so new I can't say more about it except that I didn't change anything to make this thing appear, & this didn't happen in prev.versions.

I looked in settings & the only thing on keyword "popup" goes to, in "search results", is: "block popups & 3rd party redirects." I already had that choice checked from previous versions (that is, do block). But this new popup appeared (unasked) anyway.

Is there an extension that will stop these? If so, what keyword(s) do I put into the "search extensions" box to find the extension(s)?

Also, w/this new "wonder" of unasked-for popups -- is this another "coming w/AI" feature I will have to live with?

I did a search here on "popups" before posting,but came up w/nothing relevant.

Thank you.

/edit:fixed a formatting issue causing horizontal scrolling

Good morning, I'm running Firefox Developer Edition 143.0b6 on Linux Mint 22.1. A couple of weeks ago I noticed that when moving tabs on the left-hand side they'll instantly get locked into an inscrutable and seemingly impossible to fix "pinned mode". Is there a way to turn this off? It is driving me crazy. I've looked through Settings > General > Tabs and about:config and didn't see anything relevant. If anyone has run into this or knows a workaround, I’d be grateful to hear it.