Firefox Support Forum

Sometimes all add-ons / extensions break randomly and are disabled (the icon of the extensions is also broken under "Manage Your Extensions").

The extensions are visible under "about:addons", but the slider is turned off and the icon in front of each extension is broken / empty.

It seems that deleting these 2 files- compatibility.ini and extensions.json inside the firefox profile folder, usually fixes the issue. Only these 2 files though, don't delete anything else.

No need to mess around with the ff profiles or anything else, just deleting those 2 files and restarting the firefox usually fixes the issue with the "unregistered" addons.

This thread is for the search function, as I found some VERY old and outdated suggestions for the aforementioned issue using the search function.

I wonder what causes the extensions to "unregister" randomly.

I've installed firefox and weirdly when I use youtube or just browsing the CPU is 250 and it's draining my new mac really quickly. This did not happen before on my previous mac. Seeking some help and answers, went to Apple genius bar and they've stated is the firefox application that is causing the fast drain of power.

Every time FF does an update it deletes my saved sites on the FF home page. When I try and put them back in the blank spaces it will not let me. I have tried reinstalling FF and it does not help at all. I try in safe mode and it does not work either.

Hello,

Why doesn't "open previous windows" work? It can't be checked off in settings. It seems other people have this problem. Are there any fixes? I have a Windows computer with Windows 11. It works on my Android phone, but not on my desktop.

Thank you, Tom

Safari has no problem with https://meijer.com, but Firefox flags it as untrustworthy and won't let me connect. I am using Avast! antivirus. Brave browser also works. I am using 124.0.1. I see there is a 124.0.2. I'll try that next.

I suddenly started a thick outline shadow around dialogue boxes such as the Google search bar. I thought it was them but it is on all websites and only on Firefox. I did not change anything. I did restart my pc yesterday but it just started this morning when I opened Firefox. Firefox 124, Windows 10 I don't like it and want to get rid of it but I don't know how.

Hi, I seem to be increasingly having problems logging into some sites. Mostly it seems to be football sites - https://supercoach.heraldsun.com.au/afl?destination=%2Fafl%2Fclassic&apiIdentifier=afl_classic and https://www.fanfooty.com.au/. Both are working fine in Chrome with the same username and password. Recently I couldn't log into my AGL electricity account, then suddenly, it came good on it's own. I have cleared the cookies but that didn't help. Cheers, Ian.

Hello, Firefox randomly downloaded a file, with seemingly randomly name, that is 0 bytes and in download manager the source is moz-safe-about. It happened when I was accessing a popular wiki site. I opened the file in notepad, it was empty. I put it on virus total and came back negative, as it is an empty file. I've curbed through the support tickets here, using the keyphrase 'moz-safe-about'. I understand this was/is quite a common problem, but it still makes me quite worried and left a sour taste in my mouth, as I haven't understood any of the explanations. I have enabled firefox to ask me whenever it wants to save something (I have no idea why this isnt the default state). Happened on a somewhat fresh, updated win 11 installation. I'm also attaching more information here with a picture. Long story short: should I be worried? Am I overreacting and this is just some sort of a bug that occurred while getting a sites data? Thank you for your time.

I have been going to the same website using Firefox for a year or two and now when I go there the home page for the site shows up for a few seconds then disappears leaving a white screen. Once when I was backspacing there was a notice saying it had been deleted from it's cache and to reload which I did but nothing happened. I have also been using CCleaner and I have been cleaning the MFT free space for Drive C I've been doing that for a month or so and I'm wondering if that caused the problem? I wouldn't think so if it was the problem it should have happened the first time I used it and it should happen on my other browsers and it hasn't. It's only 2 web sites that I know of that have this problem there may be others but I haven't found them yet. How do I get FF to reload the site in it's cache and keep it there if this is a problem with FF? If this is a problem with CCleaner and the free space scan I'd like to know that. Thanks for any help this is great.

How do I perform very basic editor functions like add/remove/move a page in the new Firefox PDF document editor? I am in the Mainstream Firefox 124.0.1 64-bit. Thank You, David

This is the procedure I followed:

Close firefox

Copy previous.jsonlz4 file to the main level in the profile

It has all the tabs i used to have in it because I made a backup a few days ago

Rename the file to sessionstore.jsonlz4

restart firefox

I get the same single tab I had before i did this

when i go to history tabs, all that is there is the single tab i currently have

Appreciate your help/gary

Is there a way to set the default view and sorting for file upload folder?

The default for me is, detailed view and sorted by date.

I wanted to change it to large icon and sort by name, so it's easier to upload images. but I have to change the setting for every individual folder, is there a way to just set it as default?

If I enter "na", the namu.wiki site, which I have never visited, appears as a recommendation. Even though I reset my visit history and settings, that site still appears as a recommendation. Is there a solution?

I'm using the current version of Firefox 124.0.1 (64-bit). I recently noticed that when I print -- there's no webpage title or URL address with date on the bottom even when I have checked and selected print headers/footers before printing. Is this a bug? Can you please help me? Thank you.

I am facing an issue with my Firefox.

This most commonly occurs with video playback webapps like YouTube Shorts. Intermittently, but often enough to be incredibly annoying!!) videos will stick while audio plays in the background. This does not always happen, but once it starts there seems to be some sort of cooling off period before things work again.

Reddit video player never works, seeming to silently crash - never showing the play button or video controls overlay.

I have had miscellenious other issue with other website that include forms to fill out and navigate where the elements like "next" or "submit" are completely unresponsive.

• Refreshing the page does not fix it.
• Clearing Firefox's cache and data did not fix it.
• "Refreshing" Firefox did not fix it.

Strangely, the same video/page will always work on a Private browser window. I appreciate that these windows don't have extensions active, but I have activated every extension in private browsing and it still works.

The only extensions I have are:

• Privacy Badger
• uBlock Origin
• Bitwarden

I have no idea what it is about my "normal" browser which is broken, and why things are fine in the private window, but this is immensely frustrating.

I really don't want to have to change to another browser (Chrome... ew...) but I need this fixed if I am to continue.

Since the most recent update, I can no longer run YouTube full screen in the background while I am working with other programs. This morning, when I put YouTube in fullscreen, it creates a second desktop. When I go to open a program, it switches me back to the first desktop.

I am running windows 11 on Parallels VM using Apple M1 hardware. I have attempted to un/reinstall Firefox several times but it seems to crash randomly when certain pages are displayed. Sometimes I get a crashed tab notification and sometimes there is a seeming freezing of firefox before all open tabs crash, and I must restart firefox from scratch.

How do I stop firefox from automatically downloading files from the internet when I click on them - without even asking me if I want to download them in the first place. In "Applications", selecting "Always Ask" in "Choose how firefox handles files etc" does not work. Firefox never asks. If it cannot be disabled, I will have to stop using Firefox.