Diễn đàn hỗ trợ Firefox

Upon the clean, newly downloaded from Mozilla copy of Firefox for Mac, I will get a pop-up window asking, "Open existing Firefox application?." What is obviously spurious about this window is that there is only one copy of Firefox installed.

I have used the recommendation by someone on the Interwebs telling me to go to the Terminal App and execute:

/Applications/Firefox.app/Contents/MacOS/firefox -bin -P

..after which a small applet window (called "Firefox - Choose User Profiles") pops up where I see the installed profiles for Firefox. I was told to delete all but one of the profiles, check the "Use the selected profile without asking at startup Check box, and then hit the "Start Firefox" button. Firefox then opens up.

If I quit Firefox and fire it back up again, I again see the little, "Open existing Firefox Application?" window. This goes on forever.

I have also given Firefox Accessibility, Full Disk Access, and Screen Recording rights, but to no avail.

Any ideas?

Hi

I am a web dev, and need FF help on this. All of my sync data is gone, I sign out and back in twice, I checked the profiles there's only one, all of my bookmarks, plugins & extensions everything is gone. Please I need those bookmarks some of them were very important to me I can't lose those.

Back-story: I recently want to try two distro that I had been on my list from quite a while now, VanillaOS & BlendOS, I worked on those for 3 or 4 days, before switching back to Arch, on both of them everything was working fine, I had all of my data. On Arch I had to reset my password because I forgot. Then the issue started, at first I thought maybe my internet was slow or something but now on the 2nd my data is still not synced.

I even signed out and back in, I checked the profiles(screenshot below). What should I do?

Hey hi,

Problem that's been going on for MONTHS now - when I use the bookmark manager to sort out my bookmarks, it will often 'drop' them a few lines above or below where I wanted to place them. Trying to move the misplaced bookmarks just means chasing them around the page with them NOT going where I want them, and often moving other bookmarks OUT of place. The only workaround I've found is to kill the manager and reopen it - but this often has to be done SEVERAL times to fix the problem, and it can happen again minutes later on another bookmark. Given I had to give up on the drop down bookmark toolbar because it reverts to the top of the list EVERY TIME I try to use it, I have been using the manager to access everything. The fact that it also doesn't work correctly is making me INCREDIBLY frustrated with your product. Do you have a fix, or should I ditch Firefox and find a better browser?

I switched from windows 10 to 11 and to a new laptop. Here in my new laptop Asus tuf 15 ,even though it has better RAM , internet connection, cache memory, cores the FIREFOX doesnot function properly. It's extremly laggy specially when I use YOURUBE . In my earlier HP laptop with 8 GB ram I could use 10-15 tabs at one time .It would still not lag . It could do web development at the same time I could watch youtube tutorials. But now I barely open 4-5 tabs the youtube starts freezing up to the extent that I really get frustrated. Please so something or I will have to switch to BRAVE browser or something.

I tried to download a file and got an error that said "exceeded the maximum number of connections to this server" so I researched it and it told me to type about:Config in the address bad and I would get a configuration page that said "Advanced Preferences". I didn't get that page, I only got a page with a long list of things I didn't understand but I found "http.max-persistent-connections-per-server" and I changed that from 6 to 15. Will that help? I've never ever had problems downloading files or multiple files before. What else should I do so I don't run into this problem anymore? I didn't see anything in Firefox Settings that would help configure the settings.

I've looked for solutions, some had weird MTU settings, some needed to enable hardware acceleration in Chrome, but haven't found a solution that works. Created a new profile to try that out, but still no dice.

I can do a test recording in Google Meet, which displays my video just fine, but when playing back, it's just a black screen, and that is also what happens if I share my screen. Participants get a lot of black.

I've been using Firefox with Google meet for many years, and never had this problem before. I did report the issue in Meet, but it's not likely to attract much attention from Google.

Suggestions much appreciated.

I got a notice from Mozilla that Firefox was updated over night. Now when I hit a link it goes to edge instead of Firefox. In the Firefox settings, it still says that Firefox is my default browser. I do not want to use Edge. How do I fix this. I have used Firefox for many years.

The past few days when i've tried searching for certain pages i go to all the time they won't show up under "firefox suggest" then when i check my history for them the pages are just completely gone, today i checked my history for yesterday and even though i started browsing at 8:00 the history only went back to around 13:00 with all the pages before that completely gone, this also causes me to lose all the cookies as well.

Firefox has stopped saving history and I am unable to save any bookmarks. This seems to have happened recently for no reason I can understand. I haven't made any changes. I use a VPN but was doing so before this happened. I have checked all the settings and also deleted the places.sqlite file. When I click <bookmark current tab> nothing happens and history shows as empty.

Firefox is broken. For months now anytime I watch a Live stream on Youtube it freezes within seconds and acts like it's buffering. Internet connection is great. Same live streams work perfect on Microsoft Edge, Google Chrome and others. Only Firefox browser is doing this.

All of a sudden, I can no longer open new tabs in Firefox just by clicking the top bar (sorry, don't know how to describe this: the space that sits just below the line with 'File', 'Edit', 'View', 'History', etc. (Menu bar?) Formerly, when I had a tab open I used to be able just to click that line and a new tab would open. To open a new tab now I have to look to the right of the screen, and press the '+' button (Open a new tab Control+ 1) that appears in that same area just below the that is there. Not nearly as convenient. Please tell me how to fix this as simply as possible (I am not very computer literate). I have done nothing to change anything in the Firefox settings, so don't know why this happened all of a sudden. Very frustrating. My bookmarks all disappeared too, by the way, thoughI figured out how to resstore them to top of screen. I am using Windows 10 Thanks in advance, A frustrated Cynthia

Since the most recent update, I am finding that Firefox has become highly unresponsive when it comes to loading some pages. Some are fine but others such as Reddit and Wikipedia will not or only partially load. Pictures will often only half load or not at all. News articles will often print text and fonts but nothing else.

This not occurring on all sites. And it doesn't seem to matter whether the site is https activated or not as some of the other threads seem to indicate is the problem.

I need a solution to this.

Hello there, Iam facing a problem with changing Firefox homepage background. I tried every solution, tutorial, oldposts etc. nothing seems to work, here is what I tried. -1- The chrome folder is in the right folder. -2- the naming of both CSS files userChrome, userContent. -3- enabled CSS files at startup -4- search for both CSS files in the browser toolbox for some reason I cannot find both CSS files, even though they are in the chrome directory. Also, I have 2 chrome folders one of them is located here. "AppData\Roaming\Mozilla\Firefox\Profiles\shaf5qn0.default-release\storage\permanent\chrome" the other one I created myself which is here "AppData\Roaming\Mozilla\Firefox\Profiles\shaf5qn0.default-release\chrome" I tried to delete the first one but I cant, I get an error that this file is being used even though I did close Firefox. What I am missing here?

Hello! After updating from 108 to 122, there's no restore previous session button. The recently closed tabs option only returned half of the tabs. Will this bug be repaired and how can I get back the tabs?