Questions tagged [firefox]

An open-source web browser developed by Mozilla. If relevant to the question, also include the tag of your operating system.

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Firefox does not show all previews in Ubuntu Activities overview

Context: Ubuntu shows the Activities overview if you hit the Super key. This overview shows little previews of all opened windows. Similar to how Apple does it with Mission Control. Problem: all ...
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Firefox's userContent.css being overriden by CSS of the site

To override the styles for a particular site that I am developing/debugging for, I have set up an userContent.css stylesheet on Firefox. The stylesheet is sort of working, except that the precedence ...
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How to display file size before starting a download?

In Firefox when you click a link to download it, before starting the download it tells you the size of the file you're about to download. Whereas in Chrome it just opens the window asking where to ...
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why can't i see the video in the old website? [closed]

I try install Firefox Plash player and Mayback Archive but i still cant watch it https://web.archive.org/web/20081022222944/http://x17video.com/celebrity_video/jennifer_aniston/...
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How do I allow firefox as a snap to run an external program?

I have custom links in my personal wiki to do routine tasks on my computer. For example, when I click the URL mysecretprotocol://launch-calculator, Firefox would run ~/.bin/run-from-firefox launch-...
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Why do Google Chrome and Mozilla Firefox lock their browser history? [closed]

I'm not asking why a SQLite3 database files have to be locked (that's just concurrency and synchronization between different processes accessing the same file). Instead, why do Firefox and Chrome lock ...
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Firefox allow HTTP URLs (and not force HTTPS)

tl;dr I want to browse an http-based URL but Firefox will not let me. A local network HTTP server is at http://host (port 80) and the corresponding HTTPS server is at https://host (port 443). When I ...
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How to make Chromium and Firefox show images in native size?

I have a monitor with 166 DPI resolution connected to a Xubuntu machine. When I open a page with images, or even just a single image, it's recognized to be e.g. 100px × 100px in size, but displayed as ...
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How can firefox 100.0 block local drives?

How can Firefox block access to the entirety of the local storage, such as "file:///C:/" "file:///C:/Windows/" and so on ? Thanks in advance Edit : I'll reformulate : How can I ...
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Where can I find contacts to get support on addons.mozilla.org (AMO)? [closed]

I develop Linguist - a browser extension to translate web pages, and recently, in version 4.0 I have implemented a new feature, "custom translators", to allow users to define their own ...
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Return my Helvetica Neue to default (Windows 10)

For a design project, I installed the font from this website And now some websites are very hard to read: When I try to delete it in Windows Settings, I can't because it's "In use" even ...
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Any way to fix PDF fonts when viewing in Firefox on Linux?

It's really nice to be able to view a PDF in Firefox on Linux but the font is absolutely horrid and the kerning is way off: The PDF is super easy to read in Chrome: Is there a way to make the PDF ...
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Whate are !g and !wiki called in Firefox Browser

I want to know the term used to denote !g [search term] and !wiki [search term] which is used in the search area of Firefox. Additionally, I'd like to know if it is possible to add a custom term like ...
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Firefox scroll bar disappearing

Since the last update (Firefox 100), the scrollbar in Firefox fades out slowly when you don't move the mouse for a second and immediately reappears when the mouse moves one pixel. This drives me nuts ...
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Automate a periodical "Minimize Memory usage" on Firefox

During many years using Firefox and forks and I've realized that sometimes Firefox gets slow and sometimes unresponsive. Workaround, going to about:memory, and clicking on "Measure" button ...
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Using Firefox reloader JS to reload a webpage for as long as I get redirected to a "Busy" webpage

wondering if you can help me. I’m desperate to get onto a website but can’t for the life of me get onto the appointment booking webpage. So I tried using firefox reloader to write a bit of code in it ...
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Hide native tabs - Firefox 100.0

There are multiple questions of this (of which, this seems to be the parent) but they are all outdated. I set toolkit.legacyUserProfileCustomizations.stylesheets to True and tried this text in chrome/...
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Firefox Portable : "Another instance [...] is already running" but taskkill says there is no running instance

I wanted to change the folder from which I run FireFoxPortable, but now I get this when trying to open Firefox : "Another instance of Firefox is already running." But when I run taskkill : ...
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Raritan KVM KX2 won't work because of java issue with firefox 48 on windows 10

I have been able to get past many obstacles already to even get to where am at. I was able to install firefox 48 32-bit on windows 10 pro OS. I also installed java and enabled java on firefox. Was ...
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Why do some Https download links not have a padlock in Firefox?

Why when you go to some download links by typing / pasting in the address bar in Firefox (in Windows 10), does it show https, but there is no padlock? (Similar might be seen in other browsers) Random ...
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Firefox media metadata/control support on macOS

As you can see on screenshot, Firefox doesn't provide thumbnail, video duration, and doesn't support seeking. Also the same in Touch Bar. With Safari it looks like this. Tested on this page and on ...
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MacOS Monterey - not desktop icon, but icon for different RUNNING firefox profiles

Rather new to MacOS (monterey here) though I'm a linux guru for 2 decades, and a UNIX Guru from 3 decades ago. So my question might be trite. Icons for items on the desktop is working for 2 firefox ...
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How do I set the default Firefox zoom level for *local* files?

Every time I open a new local file, the zoom level is reset to 100%. Is there a way/extension to make the default a different zoom percent? It'd be even better (but not required) if I could set this ...
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How can I import passwords from Chrome into Firefox in Kubuntu 20.04.4 LTS?

https://www.thewindowsclub.com/import-passwords-from-chrome-to-firefox says one should use, in Firefox on Windows 10: However I don't see the Saved Passwords option in Firefox in Kubuntu 20.04.4 LTS: ...
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Firefox: how do I configure kiosk mode?

Mozilla's website states: Numerous features of the kiosk mode are configurable through policy or command line parameters when launching the browser. However, other than a single example to run kiosk ...
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Force browser to use IP address

Internet Archive is probably banned in my country. I don't know how they implemented the ban but I cannot access it mostly because my browsers are being unhelpful. Here is some transcript I made with ...
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Firefox: open a file without saving

It seems like after a recent update, when opening files with Firefox the files are also saved to a default download location, which isn't always desirable. How can files now be opened/viewed without ...
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web browsers are not picking up my web server via the hosts file, but they pick up my web server on 127.0.0.1

I run a web server e.g. python -m SimpleHTTPServer 80 or python -m http.server 80(which of those depends on python version), and I do echo blah >index.html to write an index.html with the text ...
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How to get a list of tabs open on another device from your profile

I borked my old computer, and had a few hundred tabs open to work on a project. I now have a new computer, have logged into my old Mozilla profile, and can access the tabs it had saved on that old ...
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issue with 0x80070005 restricted access

I have 2 drives (C and F), on drive F there's also another windows installation with the same username as on C I didn't formated the drive F during windows installation on drive c because I don't have ...
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Access to Barclays.net (Banking )

Currently using IE to access https://cashmanagement.barclays.net/bnetservices/login.aspx and logging in via "Smart Card" However, due to migrations we need to use either Chrome, Edge or ...
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Google Chrome Port Forwarding Stopped Working on Mint

My typical workflow involves firing up a jupyter notebook in a remote server and then using ssh port forwarding/tunnelling to work locally. My laptop is running Mint Ulyana and the headless server (...
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Firefox is not displaying GitHub pages properly

Firefox is not displaying github pages properly. Tried clearing cache and it didn't help. Version is 99.0.1 (64-bit). How can I fix it? Rest all sites are working fine, only the github pages are ...
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2 votes
1 answer
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Windows 10 explorer.exe opens Unix-like file paths in browser, resolves to odd domains

I forgot I was on a Windows (10) machine and accidentally typed "/tmp" into the path textbox at the top of the file explorer. Interestingly, it opened Firefox (99) and navigated to https://...
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does firefox support a httpS blacklist?

i'm a webdev, in run test servers on localhost, sometimes randomly firefox will try to connect to httpS://127.0.0.1 instead of http://127.0.0.1 or httpS://localhost instead of http://localhost: it ...
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Force browser to use local machine certificate store for client certificates

It appears that browsers are only capable of reading local user certificate store for user certificates and not local machine store. See https://jpassing.com/2021/09/27/do-browsers-use-client-...
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Slack uses too much browser storage (two orders of magnitude more than the next website). Why, and how can I limit it?

I'm using slack in the browser. When looking at the application storage in firefox, I found that its storage requirements seem to be disproportionate compared to other websites: I'm wondering why it ...
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Can browser cookies be protected (in Firefox)?

I read an article about identity hijacking that caught my mind. Today I save my credentials locally in Firefox (using a master password). I also use multi-factor-authentication for important sites. I ...
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Disable Firefox's tab unloading feature

Starting in v93, Firefox introduced a tab unload feature. In a previous question I asked whether it's possible to disable this feature for specific tabs. (That does not seem possible.) After using it ...
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2 votes
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Suddenly SEC_ERROR_REVOKED_CERTIFICATE error in Firefox 99.0.1, but not in other browsers nor a different profile in same FF Version

Out of the blue (presumably with the last update to 99.0.1), a website I use a lot doesn't open anymore but shows An error occurred during a connection to $fqdn. Peer’s Certificate has been revoked. ...
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Where are UserChrome.css parameters like editBMPanel_locationRow documented? [closed]

I want to use UserChrome.css to remove the 'Keyword' and 'Tags' fields from the 'Edit Bookmark' menu. I imagine that I need a parameter like editBMPanel_locationRow. Where are these documented?
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Which file control proxy setting in firefox?

We can set proxy configure in about:preferences#general--network settings--settings--connecting settings with gui way. I have already set socks5 proxy with gui way,there is no word such as network....
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How to disable all searching from the location bar in firefox?

(I found similar older questions, but their answers are now obsolete.) How can I completely disable searching from Firefox's location bar? In other words, if I type some search terms in the location ...
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Why does Firefox not acknowledge camera and mic access on web page?

Gave Firefox camera and microphone access, but message requesting it displays and partly blocks the web page. On Windows 10 with the current version of Firefox on an HP desktop, a NexiGo N930AF USB ...
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Firefox is already running, but is not responding error when running owasp-mantra-ff in Kali Linux

I have setup a Kali Linux VM inside VirtualBox and I updated it using the following command. sudo apt-get update Afterwards, I ran the following command to install owasp-mantra-ff and its dependencies....
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1 vote
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How can I disable moving / animated pictures in documentation?

I would like to learn Visual Studio Code, but I cannot get past its "modern" and "engaging" documentation. The very first screen you get when I browse to this URL has a moving ...
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1 vote
1 answer
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Why are these two userChrome.css files incompatible?

This userChrome.css does what I want it to. In particular, it makes me able to edit bookmark URLs from the blue star menu. /* userChrome.css */ @namespace xul "http://www.mozilla.org/keymaster/...
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Windows Fullscreen API, browser behaviour

This turned out to be a more difficult thing to achieve than I expected. Using Windows 10, I want to be able to resize fullscreened browser windows. F11 enables fullscreen mode, in the past I could ...
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1 answer
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Browsers ignoring CSS?

I have this in a CSS file: p { margin: 50; font-family: 'Lucida Grande', Verdana, sans-serif; font-size: 50px; } On MacOS, Safari honored the margin but ignored font-family and font-size. ...
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Generic browser access to IP ICSEE

ICSEE Camera on ebay Is there anyway to access the video on this camera without having that infernal ActiveX installed on my computer? I am strictly a Linux user, so I have to fire up a windows ...
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