Firefox 技術支援討論區

Today when I close many tabs using control w firefox seems to randomly jump around when choosing which next tab to close

I wish to have firefox always close the adjacent tab to the tab I just closed

This should be the default behavior ... I do not see any setting for this ... is there an addon to do this ?

I am using the latest firefox on ubuntu

• • • UPDATE*** below answer for setting `browser.tabs.selectOwnerOnClose` has no impact on this

I have had a really consistent experience on Firefox for Ubuntu (120.0 (64-bit)):

• I open a google doc and choose "Download > PDF"
• Google Docs pops the PDF open in a new tab. The location is my own file system, eg. `file:///home/amanda/Downloads/whatever.docx.pdf`
• I use ctrl-s to save the PDF to a more suitable folder
• Firefox starts spawning dialog boxes. The black border around the dialog box just grows for a while. I can't even tell if clicking "cancel" is actually doing anything because maybe it is closing the dialog and revealing the one below.
• The only solution is to quit Firefox entirely.

It seems to also happen if I print from Google Docs or just use the finder to open a PDF directly in Firefox: using ctrl-s to save starts it spawning infinite "Save" dialogs.

Obviously, I can avoid this by using the OS file manager to move the PDF to a more suitable location but it would be really nice to not have to keep track of that.

Firefox consumes a lot of processor time in background. How to disable it?

Following options do nothing: Use recommended performance settings - dasabled Use hardware acceleration when available - disabled browser.tabs.remote.autostart = false

I am working on a website that uses Unicode extensively. Some glyphs do not show correctly. In particular U+2A75, which is double equals. I am using Ubuntu, and I have installed Unifont. In the image, I have opened Firefox on the right and Chromium on the left, the URL is https://www.compart.com/en/unicode/U+2A75 Chromium is displaying the page correctly, Firefox is not. However, in both cases, the character is correctly displayed in the text in the Tab header after the favicon. browser.display.use_document_fonts is set to 1 I have read the Support page on editing fonts. Inspecting the element as suggested in the 'Editing Fonts' page, (see 2nd image uploaded), I see - in the source pane on the left, the character is correctly displayed (as in the tab text) - the Font being used to display the character in the rendered HTML is 'Source Sans Pro', which probably does not have the glyph for U+2A75. - the Font supplied by the website (presumably it does have the glyph) is list as a font, but I can't find a way to have it display the element.

I have tried to change the font family for the selected element in the Rules pane, but that does not work.

I have tried a variety of other changes in about:config but nothing seems to work.

I have two thoughts - the Font family for some Unicode ranges may be set for security reasons, and so U+2A75 is forced to some other Font - the fallback mechanism is not working to select a font when the glyph is not in the first family.

I accidentally used wrong disk when downloading a big file. So my primary disk, where I'm running OS became 100% full. Then I removed this big file, checked that disk is not full anymore, and tried to download again, this time choosing the right disk, but now the Firefox internal file browser, where we open files, and select folder to download is broken, pointing wrong location when selecting disk/folders. I tried restarting OS, reinstalling firefox, but it's internal file browser is still broken. In Chrome it's ok, in system file explorer is ok, problem occur only with Firefox. I'm using Pop!_OS 22.04.

Is there a way I can reset this internal file browser to work properly again?

I'm using 121.0 for Manjaro

Today, I had a problem trying to re-load a website I had saved just the other day. I have a bunch of such websites for a technical project I am working on.

I tried loading the other saved web-sites. All had been saved as a complete file and by this browser. I have no other browser installed.

The problem was that the saved web-page kept re-loading. No forum-discussion could be found so the trouble-shooting option was entered into.

I opened Firefox in safe-mode (via the command-line call). Running a suggestion; clearing cache didn't resolve the problem (in safe-mode the saved web-page still kept re-loading with a rapid cycle)

The next "suggestion" I tried was refresh Firefox. Firefox advised that none of my saved data and settings would be lost. Well, my entire profile is gone!!! Thankfully synchronizing worked such that I could recover passwords, history etc. What are NOT recovered are the settings for websites, probably other infos too.

I have two login-accounts on my system and I have a shared, common profile for both. This was using a public folder with access rights only for those two users.

I have been using that profile architecture for months. This is now gone!! Those folders do not exist anymore. In its place are entirely new folders, their formats completely unfamiliar to me. I am recalling my latest backup but will it be of any use???

Many thanks, indeed.

Hello everyone. Well, I've been using Firefox for a few months, maybe a semester now, I don't remember. But the point is that since yesterday I have been facing a serious problem of not being able to download any type of file (MP4, PDF, .JSON, ISO, etc.). I've already used the troubleshooting mode and I've also restarted my laptop, but it didn't help. I've also gone to the advanced settings (see 'about:config > browser.download') and reset/deleted the data for each command but the problem still persists.

What happens is the following: I click to download the file in question, however, nothing happens other than the page loading that commonly occurs when downloading something. Still, the file does not appear in the downloads tab and there is not even the option to choose where to save the file (e.g. Downloads folder, Documents folder). The download simply appears to have failed.

Exactly, it 'appears', because today I discovered that all my downloads were being directed without my permission/action to the 'downloads' folder (And that's not where I want them to go). The problem would be smaller if only this happened, as I would then just get the files downloaded there and then change to the desired folder, thus trying to move forward despite the problem. But the downloaded files themselves are not operational, they have the icon when a file is still downloading, in addition to not having a name, everything being just a cluster of codes.

In the end, there are files, large and small, that have no use and that I don't even have control over where to direct them. Which is still a huge problem because I still technically can't download anything from the browser. Please, I really need your help on how to resolve this problem.

Note: Also, when I close and open the browser, the first download I try appears in the downloads tab, but it fails instantly and cannot be resumed, making it an eternal failure.

Over the past few weeks I've been unable to watch live videos on Firefox on Ubuntu 22.04. I thought it was just an issue with Twitch but I realized the problem also persists on live videos on Youtube and did some troubleshooting which didn't solve the issue. The only solution I was able to find for Ubuntu said to install ffmpeg, which I already had, but I made sure it was upgraded, refreshed Firefox, and still have the issue. Currently I'm on Firefox 121.0 but I've had this issue since before I updated it. I dual boot Ubuntu and Windows and am not having this issue when I boot Windows on the same computer and Firefox profile.

Since about one year I am unable to use Japanese input only in Firefox. When I try to switch with fcitx and control+space, nothing happens. However, fcitx-mocz works everywhere else on my computer (i.e. terminal, thunderbird, other browsers, etc.). Furthermore, I uninstalled fcitx and everything associated with it and reinstalled it according to this thread: https://support.mozilla.org/en-US/questions/1367181 (just with mocz for Japanese). This also didn't change anything. Any help is appreciated! My system: Operating System: Linux Mint 20.3 Kernel: Linux 5.15.0-91-generic Architecture: x86-64 fcitx version: 4.2.9.7 Mozilla Firefox 121.0

Dear friends at mozilla.org,

Thank you for your excellent browser, which I've used almost from its first versions.

I'd like to compile its source code, which I've downloaded from your website, into a working browser. I've spent several days, and get only as far as not-terribly-helpful error messages, that indicate strongly that I'm using versions of tools and libraries that the source code doesn't like.

I'm using

 linux kernel 6.1.0-13-686-pae (from Debian)
 gcc 13.2.0-9
 perl 5.36.0
 python 3.11.7

It's sufficiently important for me to compile firefox that I'd install a fresh linux system for this purpose. Could you possibly recommend to me what linux distribution I could install, and versions of compilation tools, header files, libraries, etc. that are known to work for compiling firefox? I'd be glad to report back to you my results, to help others who'd like to compile firefox.

In case you're wondering, I'm perfectly competent in installing software, including compiling anything. I'm an M.I.T. graduate, and have been a professional computer programmer for most of the half-century of my working life.

Thank you kindly for any response that you have time to send to me.

Very truly yours,

Lyman Opie [email address]

Hi,

I've been using the following in userChrome.css for many years

1. menu_close { display: -moz-box !important; }

to restore "Close Tab" in the File menu, based on cor-el's response regarding restoring menu_bookmarkAllTabs here:

https://support.mozilla.org/en-US/questions/799856

This stopped working some time ago and I am finally getting around to asking why.

I do have toolkit.legacyUserProfileCustomizations.stylesheets set to true, and other items in userChrome.css are working.

I am using 121.0 at home and 115.0 ESR at work and see the same (i.e. no "Close Tab"), in both cases on Debian testing. I do see this menu item when using the keyboard to open the File menu.

Any idea why this no longer works?

thank you, Greg

When I click the address bar, Firefox lists favorite sites. How do I disable this list until after I've typed?

I don't want the list because I don't want to be distracted by these sites.

While they are safe-for-work, I'd rather "fun" sites didn't come up when I'm working with other people.

Im trying to halt fingerprint tracking, whoever designed Firefox's privacy.resistFingerprinting rule makes fingerprinting even more prevalent.

With privacy.resistFingerprinting set to FALSE, my resolution is reported : 1920x1080x24, set to TRUE its 1920x968x24

1 in 6 browsers has resolution 1920x1080x24 1 in 6000 browsers has resolution 1920x968x24

Who in Firefox decided this config rule? and what is the logic behind it? Looks like intentional sabotage to make peoples browsers more trackable.

Whilst leaving resistFingerprinting set to TRUE, How can I force my resolution to the more generic 1920x1080x24?

Is there another setting in about:config I can change? if there isnt, where can I request this feature? Id rather not resort to an extention for something so small like this.

When I open a new tab in FF, a row of 8 boxes appears below the search bar where I can add shortcuts. I currently only use 5 of them, meaning there are 3 empty boxes left over. I don't want to have them show history, or recommended websites, or anything of the sort that might distract me; the shortcuts should only be those I actually intend to use, of which there are only 5. To my knowledge, the only easy way to add/remove shortcuts is to adjust the number of visible rows, but this only allows modifications based on multiples of the original 8. Like in Chrome, can I actually remove any excess shortcut boxes I don't want to use? I feel this is a very basic customization I'm sure Firefox should be able to accommodate.

I've included a screenshot of my FF new tab, where the three empty shortcut boxes I'm referring to can be seen. Thank you in advance for any assistance!

I fill out a specific online form on a regular basis. When I used Chrome several months ago it always remembered my form data. But no matter what setting I set I cannot get this to work on Firefox.

Under Privacy & Security I've set History to Use custom settings for history: Remember browsing and download history enabled Remember search and form history enabled Clear history when Firefox closes disabled

I have also checked antivirus, antispyware, firewall, and privacy programs are not interfering. I do have a VPN but only use this when using online banking.

Hi, it has occurred to me that I lose the browsing history of tabs that were open for a long time. By browsing history i mean the sites that show up in "Go back one page" arrow. The issue is that after a website has been open for some time (this seems to be in range of days, perhaps weeks) the browsing history of that tab is forgotten and the Go back one page arrow goes blank. I would like to be able to keep this history for eternity, is there any way to enable that?

To be clear, I use the feature to save tabs of my previous sessions and also the Simple Tab Groups extension.

Thanks in advance, Alex

After using gnome-tweaks to change my system fonts, Firefox has unexpectedly gone silent and no longer shows text in areas like the search bar, tabs, settings, bookmarks, and menus. Rendering websites works just fine, but Firefox itself won't show any text.

I just upgrade my firefox, but it did not import my history, cookies, bookmarks or passwords. I found a backup of the bookmarks (in a bookmarkbackups folder) but how do I restore the everything else?