Firefox Community Forum

Yesterday, I noticed after I closed and re-opened Firefox, my browsing session was completely gone - all my tabs and windows, my entire browsing history, website sign-in status, all completely gone. I've been troubleshooting since then.

I've noticed that the 'sessionstore-backups' folder in my profile folder is missing. When I open Firefox, this folder is created and Firefox writes some data to it, but Firefox seems to delete the folder as soon as I quit Firefox. Firefox should not be doing this. My Firefox is configured to open previous windows and tabs, and is NOT configured to wipe any browsing data of any kind when it closes.

As a sanity check, I spun up a Windows Sandbox (briefly, it's a clean, isolated Windows environment) and installed Firefox there. I also enabled the option 'Open previous windows and tabs'. Firefox behaves normally - it re-opens the tabs/windows I had open when I quit Firefox. Great, that's what I expect. The trouble starts as soon as I sign in to sync. After signing in to sync, and letting the initial sync process complete, I open a couple of windows and tabs, then quit Firefox. Firefox begins nuking my browsing session again - the 'sessionstore-backups' folder is erased, and next time I start Firefox, all my windows and tabs are missing, and my browsing history is missing.

So, at this point, I'm assuming something in my synced data has become corrupt. I haven't installed any new extensions lately. I haven't changed any of Firefox's settings that would cause this to happen. The only thing I have done differently lately was enable Firefox Sync in LibreWolf and sign in to sync there. It seems like this session-nuking trouble started after I signed in to sync in LibreWolf. I assumed, since LibreWolf is a fork of Firefox, and because there were no warnings or indications the feature was incomplete/unstable/experimental/etc., that it would just work, that it wouldn't cause any issues. But it seems like it has caused issues. I checked LibreWolf's issues tracker for anything related to 'sync', but I didn't see anything noteworthy.

I've been using Firefox and Sync for numerous years without issue. This session-nuking thing started yesterday.

I use Firefox in a few places, and based on what I saw happen in my Windows Sandbox, this session-nuking issue is going to happen in every Firefox I'm signed in to as soon as it has a chance to sync. Obviously, I do not want this to happen.

What can I do to determine what the issue is? What can I do to check if something in my synced data has become corrupted? What can I do to reverse it? I'm not opposed to completely wiping/resetting my synced data, but I'd rather not if I don't have to. The only thing I would lose sleep over is my bookmarks, but I know I can export them. Are there any debug logs I can enable/look at? Anything I should look for in Event Viewer?

Thanks.

I'm getting the F7701-1003 error every time I try to play Netflix (works fine on other browsers). I tried every step of this guide this guide and triple checked it. I tried uninstalling, resetting profile, I that checked resistfingerprinting is turned on. I'm kind of at a lost. At this point I'm being forced to use other browsers...

Regarding the current state of Firefox and WebUSB, I have four thoughts:

1. Yes, Mozilla's concerns regarding the security risks are valid, but not insurmountable.
2. In my experience, this is the single W3C noncompliance that impedes my use of Firefox.
3. In my experience, an increasing number of companies/organizations are leveraging WebUSB, from core-functionality of end-user hardware to enterprise-level troubleshooting, configuration, and support.
4. If Mozilla permits the use of unsigned plugins for its Firefox Developer Edition because of the reasonable expectation that its users understand the risks, it stands to reason that the same could be said for WebUSB.

(There's no need to reply, really - this is only being publicly posted because there doesn't seem to be a way to do otherwise - I just wanted to go through the exercise of casting this message-in-a-bottle into the sea.)

I have encountered PR_CONNECT_RESET_ERROR for the last few days. All websites cannot be accessed. I tried to uninstall/reinstall Firefox several time and nothing works. My system is Windows 11 Home, Version 22H2, Installed on ‎2/‎7/‎2023, OS build 22621.4037. Kaspersky Anti Virus is 21.3.10.319(m).

Hi, I have local saved html file which loads images from our security cams The html has only code like this

<html>
<head></head>
	<body>
<script type="text/javascript">
  var height_array = new Array();
<script type="text/javascript">
  var height_array = new Array();
  var width_array = new Array();
  width_array[1] = 320;
  height_array[1] = 240;

<img src="http://192.168.2.2:78/livefeed?oid=1&size=640x480&t=" width="320" height="240" onload='setTimeout(function() {src = src.substring(0, (src.lastIndexOf("t=")+2))+(new Date()).getTime()}, 1000)' onerror='setTimeout(function() {src = src.substring(0, (src.lastIndexOf("t=")+2))+(new Date()).getTime()}, 5000)' alt='' />

<.../script....>

No matter what I change in the "normal" settings - Firefox is not loading the page at all.(file:///Users/drew/Downloads/CAM2.html)

In the left bottom corner it only shows "Performing a TLS Handshake with 192.168.2.2". And thats it. Every other browser is able to open the page and show the camera pictures, only Firefox not. Is there a easy fix for this?

After updating the Mozilla browser, two sites related to watching TV movies stopped opening - Apple TV and Canal +. The Apple TV site does not respond at all, Canal + shows an error. Clearing cookies doesn't help. Another browser, Chrome, opens pages normally.

Every time I try to change the resolution of YouTube videos, it only provides 360p as an option, with a "Missing options?" message that redirects me to Google help page that just says my browser might be out of date (I'm on most recent Firefox and Windows 10 updates). The quality is still stuck in 360p when I reboot Firefox in Troubleshooting mode, and there are no quality issues when I use a browser like Edge. What should I be checking to resolve the issue?

Recently, I have not been able to upload a video to YouTube. When I try to upload it, the upload is stuck on 0%. I tried another browser, and it worked fine. This has not been a problem until. I have uploaded many videos. The last time was about a month ago. So, maybe there is some problem with an update. Does anyone else have this problem or know the solution?

How do i keep my work browser seperate from my home browser account. This week they got mixed up and now i only have my work firefox. I lost all my bookmarks on my home firfox.

I used to be able to press Enter in the empty Firefox search bar to bring up the (DuckDuckGo) search page and enter my search from there. Don't ask me why I like doing that, but now after the latest Firefox update, 128.0, on my MacBook Air I can't do that anymore. I have to type in the search bar to bring up the search page.

I know it's a small thing but I wonder if it can be put back to the way it used to be.

Hello! I have been having certain visual bugs occurring within the Firefox browser, I do not know what's causing them but am hoping someone can help! Firefox keeps on adding or changing translucent white boxes to multiple websites, I have some from YouTube attached below but I've had this issue on multiple websites. I'm using an ARM architecture Surface Pro X and when I reached out to Microsoft they couldn't help me since the error was just in Firefox.

Hi community!

For some reason, the short description of an email is now under the subject instead of besides it in the overview. This does something to my head that, atleast for me, makes it cluttery and hard to hover over who sent me email. I want a column with who sent me mail, then I want right of it a short description, the start of the mail, just like it always was. It takes vertical space so less email is visible and my head has to switch from "from" to "content" to "from" to "content" which is for some reason very tiring. It's one of the reasons I hate outlook... Please don't tell me Thunderbird changed into outlook -_-

How do I change this back to the way it was?

Firefox locking up today 07/31/2024 - won't compose send email in Yahoo/AT&T; only loads half a page of AOL News. Yes, I've done a restart. Chrome seems not to have this issue.