Firefox 技術支援討論區

For some reason, whenever I load a pdf from within Firefox, I get a new tab with the regular toolbar displayed on top of pdf files, but the document itself is completely blank (see attached screenshot). This issue just started today and I assume it was a result of an update, since I don't recall making any changes to my settings (I'm using Firefox 101.0.1 on Ubuntu 20.04).

I've tried opening multiple files from a variety of sites with the same result. All of them open fine using my system's pdf viewer, as well as from within Chromium. I've tried disabling my plugins, putting Firefox into safe mode and resetting all the handlers, to no avail. Any help would be much appreciated.

I want to select multiple Tabs from a bookmark folder to open in the background.

On Chrome this used to be quite easy: Just open the Dropdown, click whichever tabs you wanted to open with the Mousewheel and done.

On Firefox you need to enable new tabs to open in Background first. I managed to find the setting for that with google after a while. You need to go to advanced settings by typing about:config into your url bar.

Then you search for browser.tabs.loadBookmarksInBackground and click "enable".

But this didn't fix the other issue I had, that the dropdown menu always closes as soon as I click anything.

Is there a way so it stays open until I'm done selecting the pages I want?

I am reinstalling Windows\Firefox, and would like to hide\remove Bookmarks Toolbar & Other Bookmarks, as shown on the images. The Delete Folder option is greyed out for both, and Other Bookmarks is empty.

Both were hidden\removed in my original installation, but I can't remember how I did that. I've seen posts mentioning e.g. browser.toolbars.bookmarks.2h2020 (it doesn't exist) in About:config, right-clicking on the Other Bookmarks and uncheck it (it doesn't exist).

I'm using Firefox 101.0.1 (64 bit).

Audio was working fine until recently. Now, firefox has no audio playing on any site.

Some sites show "PLAYING" in tab, but others like YouTube don't show that notification. Even with "PLAYING", there is no audio output.

I checked Windows settings and Firefox is set up correct (and the same as it was before it stopped working), see screenshot attached. Otherwise, I restarted Firefox, tried it in troubleshoot mode, and reinstalled Firefox. No changes.

Possible system changes include: Maybe a Firefox update occured and broke the program? I installed the game Civ5 from Steam which required some Windows VS redistributibles installed.

I have tried all of the suggested solutions here at Mozilla for how to delete a website URL from being autofilled: whenever I type 'pre', the autofill function fills in the rest of the website 'www.preply.com'. It was a horrible ESL teaching scam website, I only taught through it for a month last November then quit when they ripped me off. But now since last November, any time I type in 'pre'–I invariably see their annoying, shitty website :-( It is very annoying because it was a bad employer experience–and now I cannot ever remove them from Firefox :-(

I tried deleting it in the address bar with shift + delete, then also went into some obscure Firefox folder and deleted some file with Firefox closed (this was the supposed "solution"–it did NOT work).

Is there any way to solve this incredibly annoying issue? Or should I just switch to Chrome or Safari and give up? Very disappointed in how impossible Firefox makes deleting autofill URLS, really, REALLY BAD software programming. Any helpful or solution greatly appreciated thx :-)

Using Mac OS 12.4 and Firefox 101.0.1. After launching Firefox, a second icon appears in the "recently used" apps section of the Mac OS dock (see attached screen shot). The icon stays there and goes away, and then comes back, and then goes away, etc. This continues on and on until Firefox is closed.

Why is this happening? Never acted this way before the latest updates.

My bookmarks have been broken up in the categories for years... ie: Research, Health, Shop, Weather, News, YouTube, etc. Suddenly today the News tab is missing from the Toolbar??? I can't find it when I search in Manage Bookmarks. Where did it go and how can I get it back???? Help!!

In the last few weeks Firefox will not open even when using admin rights. NOTE: I have followed all available posts including multiple uninstalls (complete), deleting Firefox folders, reinstalling, etc. There have been no major (or known) changes to my Windows 10 Pro system. I run Heimdal Thor and Kaspersky antivirus protection and there have been no conflicts running both at any time. I also use Acronis Protection (I know it may seem like overkill but it works). I have turned off each of the above and Firefox still does not open. Firefox runs with no problems on my personal and work laptops. I am CompTia A+ Certified so somewhat knowledgeable (a little knowledge is a dangerous thing!) and have run sfc /scannow with no issues noted. Plus, two Heimdal support reps have logged onto my system, attempted to find a solution, found no issues with my system (Omen 880 even though I don't game). My wife is a dedicated Firefox user and wants it back.

Firefox 101.0.1 + extensions, Windows 11 22H2; both fully updated

Firefox has stopped saving the position of its window, looking to me like it is leaving space for my Windows taskbar but which is hidden.

Some online searching and I found that setting privacy.resistFingerprinting to false resolves the issue, but it is not a change I feel comfortable with and wonder if there is another solution. I have uBlock Origin installed so maybe I shouldn't be concerned.

Lighter fonts (from multiple families, and on multiple websites) are rendered so poorly they are barely legible.

I already tried disabled performance settings, and turning off ClearType in Windows (it barely had any effect)

How do we fix this?

When I try and open some articles on the BBC new wesite I get the attached message. How can that be resolved please? VPN is off. Error: 410 Gone Your client has made a request for a BBC domain that is no longer hosted on Akamai, but the request was sent to an Akamai IP address. This suggests your client is using a very out-of-date DNS response, or one that has been altered. If you're using VPN software or similar, try disabling it and / or contact your VPN provider's technical support.

Requested URL: https://www.bbc.co.uk/news/world-asia-61820604 Ghost IP: 104.124.180.165 Slot: 3891 NPN / ALPN protocol: h2 Client IP: 130.43.170.125 Timestamp: 1655367219 Internal ticket reference: PRB-1597.

I am trying to download a spreadsheet file which has a .xlsx extension. Firefox insists on downloading the file (my default action) but I want to be given the option to open in my spreadsheet program (Libreoffice).

Looking in Settings and scrolling down to Files and Applications -> Applications, there are other spreadsheet formats present but not one for .xlsx. How do I add the "Always Ask" option for .xlsx files?

Libreoffice is the default system application for opening these files.

I first thought this issue was contained to a single website and was the fault of their IT, but I have begun to experience this issue on other websites, and it does not occur on other devices also using Firefox. It is difficult to explain given that I don't have any idea what is actually happening, but hopefully I can make it clear enough.

For some websites that require a username and password, I will correctly login and pass authentication but then I will be booted back to the initial login screen, almost like the login failed. I only know that it is technically a log out, not a failure, because I have briefly seen the URL change like I'm logging out. I have tried uninstalling and reinstalling Firefox fresh multiple times on my Windows 11 laptop, but the same issue occurs consistently.

This happened when I was trying to login to the student portal for my university and when I was trying to login to my apartment's resident portal. Changing cookie settings or going into a private browser has not helped at all. I cannot tell if this is a bug with Firefox (maybe just on Windows 11?) or if there is some background setting that needs to be adjusted, but it is very frustrating. If this keeps happening, I would have to switch to a different browser, which would not be ideal.

Does anyone have any idea of steps that I could take for troubleshooting or any experience with similar issues? Any help would be greatly appreciated.

Hello Please explain to me how to transfer tabs from desktop to Android phone because there is no option on my desktop browser settings and no matter how much I sync, the desktop tabs will not be transferred to the phone again. please guide me

When I look up the error message I get, everyone I see who got it can't open Firefox, but I can open it fine. For me, I have Firefox as my default browser and when another program (tModLoader on Steam) tries to open it, it gives me "Profile Missing," "Your Firefox profile cannot be loaded. It may be missing or inaccessible." I don't know if it gives the same error for other programs because I can't think of any programs that open my default browser. When I switch my default browser to Edge, the program can open Edge fine.