Firefox Support Forum

My Firefox settings are configured to "Open previous windows and tabs" on Startup. This worked fine until this morning, when I lost all of the tabs in my session, including the pinned ones. The last time I closed Firefox, there was only one window open.

I have already tried these ideas to restore the tabs:

• CTRL+SHIFT+T: Does nothing
• CTRL+SHIFT+N: Does nothing
• Three bar menu -> History -> Recently closed tabs: The list is empty
• Three bar menu -> History -> Recently closed windows: The option is greyed out
• Three bar menu -> History -> Restore previous session: The option does not exist in the menu
• Open user profile folder and open sessionstore-backups folder: There are three files named "previous.jsonlz4", "recovery.baklz4" and "recovery.baklz4". They are each 2KB and contain only an empty tab with the URL "about:home". There are three additional files starting with "upgrade" but they are from too long ago, so they don't contain the tabs I require.

The contents of these tabs are vitally important for my work, so this is causing me significant stress. If anyone can suggest ways to recover my previous tab beyond the documented fixes, I would greatly appreciate it. Thank you so much to anyone who can help!

For a few weeks now, FIrefox will not play DRM content video on this computer. I have tried all the suggested solutions and none have worked. Also, I uninstalled and reinstalled Firefox, but the problem remains. I am very frustrated with this problem and am ready to get rid of Firefox permanently on ALL our computers unless this can be fixed.

Thank you in advance for your assistance.

I have some Bookmarks on my laptop. I have some of these Bookmarks (Not all) on my tablet, plus some other Bookmarks.

If I sync them, which direction does the sync work in? Will all my Bookmarks on my laptop now appear on my tablet (Which I do not want to happen)? Will all my Bookmarks on my tablet now appear on my laptop (Which I do want)? Will I end up with two copies of most Bookmarks, because all my laptop Bookmarks are transfered to my tablet, plus all my tablet Bookmarks are transfered to my laptop?

I cannot find any explanatioin of what Sync actually does.

BEFORE ANYONE ANSWERS THIS PLEASE STOP AND THINK. I have been using this browser since Netscape. I have been "managing" bookmarks for years and years but I have NEVER found a SOLUTION to managing bookmarks in a SIMPLE, USEFUL way. I have wasted hours and hours on this site looking for answers to the ongoing difficulty that EVERYONE has dealing with the BROWSER WARS imperative that bookmarks can be imported and therefore, perpetually duplicated in an infinite array of browser upgrades and OS installations over the YEARS AND YEARS. For those of us who have managed to ERR on the side of caution and always opt to live with the effects of this rather than risk LOSING the good data nested within, I implore Mozilla to THINK LONG AND HARD on developing a solution to this ONGOING PROBLEM WITH BROWSER BOOKMARKS MANAGEMENT OVERALL. Oh sure, there are hundreds of plugins that ultimately suck up the memory for partial solutions to the PROBLEM that is caused by each new installation of Firefox or other browser in which past bookmarks are imported and ultimately duplicated ad infinitum. I don't need to know all the things that are wrong with Microsoft and how developers or users create the problem, I need a SOLUTION.

Will Mozilla please be the FIRST BROWSER TO SOLVE THE DE-SHITIFICATION OF BOOKMARKS no matter how poorly mismanaged and duplicated they were in past iterations?

The more time I spend on this HELP site looking for answers, the clearer it becomes that this is a problem for DEVELOPERS to solve because none of the USERS can figure out the answers. So, BEFORE you tell me ANYTHING, SHOW ME THE MOZILLA FEATURE THAT SOLVES BOOKMARKS MANAGEMENT THOROUGHLY AND SIMPLY, because, so far, that clearly does not exist.

For the past few days, when I try to log on to PlayStation on Firefox, the sign-in page sits on a loading swirl after inputting email. There's a clear memory leak shown on Task Manager. The menu bar's right-click doesn't draw properly. FF can't be closed and needs to be terminated. The only extension I have is uBlock Origin disabled for this site.

This website works on Edge.

Attached is the broken menu from right-clicking the menu bar.

After a update my browser was running very slow, I'm not sure what I did but my whole browser, including history and bookmarks and add ons reverted back years. But I have a whole folder of Old Firefox Data which is from today.

How do I get this back on there and get everything back to normal?

I found an answer to this question, but I need it in English; how to do this if you're not a programmer. The new feature is beyond annoying, so if someone wants to work on making it optional, that would be a super improvement, but I'll be happy if I can just turn it off! Thank you

Using text boxes such as comment sections in certain sites will "duplicate" the boxes directly over it Scrolling up and down will lock the boxes on screen and leave multiple traces of the text boxes Refreshing the page will remove the boxes temporarily but will happen again Happens inconsistently on multiple websites Site shown under is dcinside.com

I restarted my computer and when I booted Firefox up it looked completely different. I'm assuming they updated, but updates never impacted my settings before and in this case none of my sessions or history is left.

I logged in to my Mozilla account and that recovered my extensions, though not my toolbar settings.

The real issue is that all of my tabs and windows are gone. In History, "Recently closed windows" is greyed out and Recently closed tabs shows nothing but what's been opened since I restarted.

Is there any way to recover my history?

Edit:

Resolved: Somehow a blank profile had been set as the default.

Hello! Since updating to the last version (119.0.1), Firefox started keeping my open tabs between sessions. This is a behavior I don't want, and the only solution that I found told me to enable "clear history on close", however that is also not ideal, because I don't want to clear my history. The "Open previous windows and tabs" setting is off and my homepage is set to Firefox Default. I don't know where else to look for such a setting, except in the about:config, but even there I'm not sure which one is causing the issue. Any assistance would be appreciated.

Windows 10 Pro 21H2, Firefox 119.0.1

The box in Settings > General > Startup > Open previous windows and tabs is still unticked.

Does anyone know what could be causing it and how to fix it?

Thanks :)

I have search separated from the url bar, and I have Firefox Suggest configured to only use history for tab completion. I've noticed a couple problems.

• Search is being prioritized over options in my history. I have the separate search box, if I wanted to search I would use it. If I type a single character I want the most common result from my history to be the result of hitting tab.
• I've noticed recently that I'm getting sponsored results even though I have them disabled. It's somewhat inconsistent, and I've only noticed it in one of my profiles. Specifically I am used to "w <tab>" taking me to weather.gov but I'm getting sponsored results for AccuWeather. I clicked the "feedback -> not interested" button but this is concerning that Firefox is ignoring preferences and there's a pattern of sending data to Google and AccuWeather despite me configuring the browser not to.

During my absence my house maid created a Google account for herself on my Firefox browser, which is confusing my browsing as it is also a default account. I wish to remove my maid's account but cannot find how. Please help. I am using Windows 10.

In the Microsoft Store there are all these updates for video extensions like "AV1 Video Extension". Should I be doing these updates? Do they make any difference to streaming video on the Firefox Browser?

Just pointing out the idiocy of this software... despite having tabs with multiple pages of the same host website open, Muppet-Zilla FireFux starts giving me the old Secure Connection Failed rubbish. Take the link, open it in public of MFF, it opens fine. Even a page that was open fine, try to open a link it, Secure Connection Failed rubbish. Hit the back key, A PAGE THAT WAS OPENED, then Secure Connection Failed rubbish. Yet in CCLeaner, Vivaldi, Chrome, Edge, no issues. So, I guess the message in that is clear - uninstall MFF, never install again. Good to know.

For the last few days the ebay website is very slow when I open it. If I switch to Chrome, ebay's website loads okay. All other websites seem to load through Firefox with no problem. Any ideas???

When I went to watch Tubi TV today I got this error message when I tried to load the video:

"Oops, your web browser is no longer supported. Please upgrade to a modern, fully supported browser."

But only for a few seconds, then it shows

"Sorry, there was a problem loading the video player. Please try to reload the page. If you are using an ad-blocker, please disable it or whitelist tubitv.com If the problem persists, please contact us at tubitv.com/support"

I booted my firefox in safe mode, still get this exact sequence of events. My firefox is up-to-date. Is there a workaround for Tubi blocking content from firefox browsers? Is that what this is? Thank you

Hello, I have been a diehard Firefox user since it was still in Beta. I have been using computers personally since 1994 and professionally since 2004, doing Windows and Linux systems administration. I can and will do whatever (within limits) you need me to do to troubleshoot and resolve this issue, which is otherwise going to cause me to abandon this otherwise excellent browser, perhaps forever. The browser.cache.disk.capacity seems to work, but browser.cache.memory.capacity does not.

Why does firefox not respect the assigned values for browser memory cache (browser.cache.memory.capacity)? Is there anything I can do to limit the memory and processor usage of Firefox and its child processes? Is extension CPU/memory usage constrained by the application values? Is there a way to determine and/or limit the resource usage of extensions?

I have included a number of screenshots documenting its behavior and generated an about:memory report during "normal use". After configuring a number of system variables, I then attempted to determine its resource usage under heavy load.

Open the browser with a couple 2, 3 tabs: ~1GB memory usage Use the browser as "normal" (dozens tabs): ~2GB memory usage Open 100+ tabs from history: The CPU and memory resource usage increases until it consumes all available system resources despite configured values. After killing and restarting the process, the tabs have invisible titles in the extension and browser, and must be closed using Ctrl+W until only a few remain after which the browser can be used normally and again consumes ~1GB.

While I understand "just don't open so many tabs", under some circumstances such as poorly written websites, bugs, etc, even single sites may attempt to claim excessive resources. I sometimes run VMs and such on this machine and in order to retain a responsive system, cannot have applications consuming all of the available resources. I have found one proposed solution that uses an external application, is this the only way?

I am open to allowing Firefox to utilize more of the SSD storage (the 1GB limit was imposed for testing) and would be fine with increased slowness due to disk cache or refetching internetworked resources. However, none of the settings I have changed or attempts I have made appear to be able to limit the memory usage in any way. Additional included screenshots are linked above instead of as attachments due to number. I can share or generate additional reports to assist in troubleshooting.

Thank you! JackD