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This thread is for the search function, as I found some VERY old and outdated suggestions for the aforementioned issue using the search function.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

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.

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

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.

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

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.

I get this message from Gmail when I try to print or open in a new tab.

"Grrr! A popup blocker may be preventing the application from opening the page. If you have a popup blocker, try disabling it to open the window."

I can not find a way to fix this and did not have this problem with the previous version.

Garry Emailed removed for privacy reasons

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.

Hi I've no idea which section this should go.. I'm having an issue when a youtube channel im following sets a live. When I get the card on the desktop for the 30 min timer, I'll click it.. sometimes it will open in a new tab (usually the card just disappears), that's another problem.. Anyway.. If I switch to the new tab at the time the live should have started, it shows the counter reset to 30 minutes.. if I F5 the page it will load the live.. Is there a way to auto start the live when the counter hits zero?

Hope that wasn't as clear as mud...

Thanks

Last update disabled picture in picture mode -- on top of full scree applications.

Please advise how to correct / adjust. This feature is vital to my work.

Thank you for your time and help.

I would love to remove CNN and MSNBC from appearing on my computer. If I can get them from auto playing that would be nice also. What do I need to do? Danny *Email removed for privacy*

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

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.

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.

Every time I try to use Google Docs, Gmail, or use ShelterLuv (I work at a shelter), either the tab crashes or the whole browser does. I try to upload images onto ShelterLuv, but once I click "Browse" to view my pictures, the whole browser crashes. It is making it hard to do my job.

Crash report (most recent): bp-2ae75fbf-b2c6-4419-93fb-9ee600240401 That one is from me trying to upload an image onto ShelterLuv.

Thanks in advance.

How do I download language data for translating on a machine that is not connected to the internet?

I already followed the instructions here to download an offline firefox installer: https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

and I downloaded the language packs I want here: https://releases.mozilla.org/pub/firefox/releases/124.0/win64/xpi/

and I followed the instructions here: https://support.mozilla.org/en-US/kb/deploying-firefox-language-packs

But translation still doesn't work. I even manually installed the "*.xpi" packs into the browser. I can see in Firefox's settings that it thinks the packs are installed, and it offers to translate pages it detects are in a different language, but translation fails. I noticed that the language packs are smaller than I would have expected - smaller than 1MB. Is there a way to download the language data that is needed for offline translations?

Thank you!

I have the latest version of Firefox (124.0.1) that I'm using on macOS (14.4). The problem is that the whole top section of the browser (tab bar, location bar, and bookmarks bar) is dimmed out a lot of the time. Including when the browser has desktop focus. This, as you might imagine, is very annoying.

Don't know what's changed, I haven't done anything to Firefox that would make this happen. Wondering if this is a bug in the latest version that will be fixed, or if I need to pursue this. My plan would be to log out of my Mozilla account on the browser, reset all the settings, then log back into my Mozilla account in the hopes that this is something that won't survive that process; i.e. not saved in my saved settings.

I'm about at the point of stopping use of Firefox, which I really don't want to do, if I can't fix this due to eyestrain from squinting at dimmed tabs, etc. If this is a release-related problem, I can put up with it until it's fixed.