Diễn đàn hỗ trợ Firefox

When attempting to install an extension and clicking on "Add to Firefox" the button is replaced with a "Cylon" throbber and the popup dialog asking to confirm the install never highlights the "Add" button. The browser will stay in this state indefinitely until the tab for the extension install is closed.

Could this be a permissions problem involving the ".mozilla" directory tree in the home directory? I've been having this problem regardless of the FF version for some time (going back to at least v110.x). The recent issue involves that 115.9 ESR version installed in Debian Bookworm.

TIA...

I view a lot of pdf documents via firefox, the light gray background makes my eyes and head hurt after prolonged usage. In the past I found a solution on this forum that advised to set pdfjs.viewerCssTheme to "2" in about:config. This set the background of pdf viewer to black/dark gray. This has worked for years until recently when the pdf viewer switched to light mode again (pic 1). I checked the about:config settings for pdfjs.viewerCssTheme but there appears to be no change. I tried restarting the browser, setting the theme to 0 and to 2 again, updating browser. Sadly the theme is still light gray. Is there a way to change it again? The desired outcome is in pic 2. I do NOT want to change the color of the pdf pages themselves.

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This thread is for the search function, as I found some VERY old and outdated suggestions for the aforementioned issue using the search function.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

Just updated a friend's computer from Windows 7 to 10. Installed firefox over previous ESR and now there's no way to remove the search bar from the new tab page. On my W10 system, the search bar isn't there, not sure how or why, but on her's there's no option NOT to show it as there used to be.

I found some VERY old (2014) info on this but doesn't seem to be up to date.

PLEASE give us our options back and stop taking them away, sheesh, getting as bad as Microsoft.

Is there a workaround for this to remove the redundant search bar from the new tab page since you can search from the address bar?

Thanks!

Lest update to 15.9 all my extensions are now disabled. Missing Lastpass and Surfshark from my menu bar. Doesn't seem to be any way to Enable them from Extensions screen.

I reloaded Lastpass from their site and this is now working on my Menu bar.

But what happened to cause this

To open a link of a website in the background tab is CTRL+click, why is it that to open a bookmark of the bookmark toolbar in the background tab is CTRL+shift+click. It is confusing! A bookmark is a link! For comparison, both of them are CTRL + click in chromium. BTW, there is no explanation in advanced configuration preferences.

Hail all:

OS: W11Ent_x64 V: 22h2 (b: 22621.3447) FF: 124.0.2 x_64 I tried several "Group Tabs" add-ons, like: Simple Tab Groups. Tab Group. And I few I can't even recall the name from. Yet, none works. Not ONE.

Now, I use Edge as well, on my corporate system that I got from work. Personal PC I use FF on.

But, the Edge Tab Grouping, which allows tabs to be "put to Eco-Sleep", while hidden the open tabs by clicking the Group-Tab Icon, is a feature I sorely miss in Firefox.

Odd, as, so many requested this feature, how come it has not been implemented over the many years of people asking?

Either way: Does anyone know a good, WORKING add-on that does the "Edge Thing" with FF tabs, please? Since, I often got like 200 tabs open, which is a real misery without Tab Grouping and "Hiding".

Thank you aforehand: Ke'Ylan.

I sent an email to the support email given for this add-on but didn't get a response, so maybe others can help:

I'm using the 'Simple Tab Groups' add-on on my Mac computer and am happy with it but I have one question. When I click on a web link in an email (I use the native Apple Mail), it of course takes me to my default browser which is Firefox, and then within Firefox to the simple tab group that I had open in Firefox before clicking the link. Logically I guess that's reasonable behavior but typically that's not necessarily what I want; I'd rather it open the web page in my 'main' tab group.

Is there a configuration option to say: "When clicking on a web link in an email, open to this xxxxxx default tab group"?

remove ad blockers even though I already have removed them.

printer is not recognized as being online although my other devices don't have the problem. i use Firefox on all devices

I accidentally pressed a lot of keys on my keyboard and for some reason the default colors of Firefox have changed. I found out that by using Ctrl+Alt+D that I can switch the colors back to normal or to the colors that now appear automatically, but this only works for one tab. If I open a new tab, it shows the weird colors (see images below). I tried looking up specific shortcuts for Firefox considering the shortcut mentioned before (Ctrl+Alt+D) only works on Firefox. But I can't find any shortcut tied to that combination. I'm unsure what to do and how to fix this.

I would appreciate it if someone could tell me how to fix this.

Hello everyone, I’m a fan of Firefox due to its efficient handling of webpage caching and memory management. However, I often find myself switching back to the Chromium-based Edge browser due to one specific feature in its DevTools. In Edge, when I resize the viewport, it stops at a certain limit. If I want to resize it further, I can zoom out and then continue resizing. I find this feature very useful. Is there a way to have similar functionality in Firefox? I’m currently using the Firefox Developer Edition.

Can someone please answer how to reset firefox size after you've been using a bigger screen and go back to the laptop the top bar is lost way up and I cant catch it to move it to resize the firefox window. Using Fn and F11 to go into maximize mode doesnt help me at all cuz I end up in full screen on the FHD screen but cant grab and drag the window to resize it again - and please NO comments about using FN and F11 again. This is an issue thats been since years - cant figure out why ppl who are tryin to help think others dont know the difference between maximization and the window being bigger than the laptop screen and being lost. So FIREFOX key-shortcut for window size reset URGENT PLEASEEEE - Im having this issue couple times a week. To fix it I gotta go again to the bigger screen reduce the size of the window and then disconnect - which is soooo horrible.

After the latest update (124.0.2), two of my add-ons (Tapermonkey and Youtube Redux) are not working, even though Firefox says they're enabled, and it is giving no indication that the add-ons aren't working, no pop-ups to enable some permission for these extensions. Both of them reformat the layout of websites to make them more usable, and using sites without them is basically impossible for me. I have tried:

• Restarting Firefox
• Disabling the add-ons, refreshing, enabling the add-ons, and refreshing again
• Checking for add-on updates (everything is updated)
• Deleting and reinstalling the add-ons
• Restarting my computer
• Checking the permissions in the extension menu
• Turning off all other extensions except for one of the ones with issues
• Reading through the FAQs and help pages and following the instructions on some of them

Nothing has worked. Every time I reload one of the sites affected by this to check if it's finally worked, the site takes a very long time to load. Since these add-ons are for different websites and both aren't working, I know that the problem is not with the sites themselves. Thank you.

I am trying to use OBS Virtual camera, I am resetting permissions of camera access, removing cache and data to be sure, and selecting it but it still doesn't let me use OBS Virtual Cam and selects Built in cam automatically does anyone has any solutions ?

when I enter for first time I can select and i select OBS Virtual Cam and I click on Allow and then next window pops up and it doesnt let me select anything else...