Questions tagged [firefox]
An open-source web browser developed by Mozilla. If relevant to the question, also include the tag of your operating system.
8,808
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userChrome.css changes to Firefox only take effect on Ubuntu, not Mac
I have a userChrome.css file that I use to remove unused menu items from Firefox context menus on my Ubuntu machine. Here is the contents:
:root[inFullscreen] #PersonalToolbar {
visibility: ...
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2
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32
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How do I get email notifications for Firefox updates?
As Mozilla shut down their mailing lists some years ago, is there a way to still get notifications about Firefox updates via email? Maybe by a third party?
Screen-scrape their download servers?
- 579
3
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2
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How to see image size in Firefox?
I would like to have a way to see image size not in pixels but in bytes. I tried Tools > Page Info > Media but I have a table with "Size" option not enabled by default and after I have ...
- 41
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29
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convert the .json file back to .jsonlz4 file as it was in Firefox
Hello every professional engineer
I knew how to convert the Firefox file sessionstore.jsonlz4 to .json file by using this website https://www.jeffersonscher.com/ffu/scrounger.html
and after editing ...
- 11
1
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1
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40
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How to disable google automatically being selected in address bar when pressing G on a new tab?
When I open a new tab and press g, it suggests and selects my google.com bookmark:
However, whenever I open a new tab and press y. It suggests searching for the letter y on google and I have to press ...
- 191
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1
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39
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How to get rid of the back and forward button in firefox 126.0?
I tried to create a file in my profile folder: chrome/userChrome.css
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");
#back-button, #forward-button {
...
- 5,032
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24
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Firefox bookmarks folders don't open on hover
I posted this question long ago on Mozilla's own forum, but didn't receive a definitive answer, so let's try on a higher-traffic forum.
I've got plenty of bookmarks organized in folders and sub-...
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35
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Set custom accept headers in Firefox
I don't like *.webp images, mostly because Firefox keeps downloading them rather than just displaying them, but also when I do want to download the image, I intend to feed it to other software, which ...
7
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1
answer
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What determines the number of Firefox processes?
I see there are 20 tabs on my Firefox browser, but 31 Firefox processes in the Firefox process group in the Task Manager. I think one Firefox process corresponds to one tab, so why are there so many ...
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78
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F12 no longer run dev tools in Firefox
In Firefox (version 126.0), F12 no longer launch dev tools.
In the hamburger menu, More Tools, i only have "Task Manager" and "Page source".
I've tried repairing the install, full ...
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0
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87
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Firefox Ubuntu 22.04 font hinting problem
I don't like font antialiasing and always turn it off. Previously I used Ubuntu 14.04, now I'm switching to 22.04. For most applications I have disabled antialiasing using gnome-tweaks, in both ...
- 11
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How to get a indicator on firefox when moving tabs
I am looking for a way to get an indicator to show up when moving tabs in Firefox (and variants).
This is broken with Firefox multitab using chrome CSS.
This feature seems to be present in one of its ...
- 171
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1
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151
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How to stop websites in Firefox from nagging about adding them as an application for mailto links?
I'm using Outlook online for some corporate inboxes that I have. I access it using Firefox on Windows (currently version 126.0).
All too often, the web application at https://outlook.office.com/ nags ...
- 524
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29
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why i can't adjust my window size or move firefox in kali
I just opened up my pc, only to find i cannot adjust firefox window, my terminal is displayed at the bottom and it cannot move either. I typed in the following command based on the following solution ...
- 11
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1
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40
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FireFox sending HTTP3 PING packets every 15s long after all tabs are closed
I noticed some strange network activity so I did some investigation. My FireFox browser is sending HTTP/3, QUIC PING packets to a site that I left at least an hour ago. It is not a shady site but I ...
- 2,547
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Why does Firefox refuse to load sites if there is an entry in the ‘/etc/hosts’ file in macOS 14.4.1 (Sonoma)?
If I make an entry in /etc/hosts for a site, Firefox (v125.0.3) refuses to load the site. I'm running macOS 14.4.1 (Sonoma).
The entry in the /etc/hosts file is:
93.184.215.14 example.com www.example....
- 503
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2
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How can I make Firefox or Chrome ignore the system time on Mac OS?
I'm a software engineer trying to test some things. Would appreciate if anyone knows how to do this on Mac OS.
2
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Firefox can't reach mdns .local names with more than two labels (local fake subdomains)
Fake MDNS subdomains like aaa.mypc.local work with any Chrome based browser but not with Firefox.
Firefox can reach hostname.local and extra .local names like myservice.local but not more than two ...
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1
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196
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Firefox uses UTC time instead of UTC+2
all of a sudden, TV program schedules were shifted by (-2) hours. Here are some relevant details on this problem:
1. Linux Console
~$ timedatectl
Local time: sam. 2024-05-04 12:41:03 ...
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62
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Shortcuts appear again in new tab Firefox
For a few days now, every time I open a new Firefox tab, the same shortcuts appear again even though I have removed them several times.
Example:
Open Firefox and show all the shortcuts
Image of ...
- 11
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0
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36
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New Firefox ... too much white space in left margin?
Just accepted installation of new version 125.0.2.
The ideal of any FF upgrade is that nothing new should be noticeable. However, I notice what appears to be irksome excessive white space in the left ...
- 675
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68
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Firefox "Save to PDF" function does not print headers/footers
Firefox 125.0.2 does not print anything in the headers and footers when I try to save a webpage using the "Save to PDF" function.
For example, I configure the "Page Setup" to only ...
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How to disable Firefox search when not typing on any input field? [duplicate]
I want to play https://vim-adventures.com/, but I can't use any key, as Firefox will automatically start searching for text, as if I press Ctrl + F. I know this is convenient for most case, but here I ...
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372
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Why is Firefox 125 25% faster?
I opened Firefox today to find it had automatically updated to Firefox 125.0.1 and was displaying this splash screen:
However even when I click through to the release notes, it's not immediately ...
- 13k
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1
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329
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Strange behaviour of Firefox PDF viewer
I am not sure if this question is on-topic, but I suspect the problem might be connected to Linux (since I've never had this problem in Firefox on any other device). I am using Ubuntu 23.10.1 with KDE ...
- 151
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2
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99
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Firefox not obeying system wide preferences
Ubuntu 22.04
Firefox 119
I have the /etc/firefox/syspref.js file below but my Firefox is not using the custom proxy settings and just defaulting to "Use system proxy configuration".
pref(&...
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456
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How to open a link on a new tab in firefox
In Firefox when I click on a link I want to open the link in a new tab.
Followed the steps mentioned in the official doc but that doesn't work:
https://support.mozilla.org/en-US/questions/1260343
...
user1096880
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79
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Without System Restore, after clicking 'Deleted Files', how can I recover a deleted profile?
I followed this moderator's post on Support Mozilla.
My hard drive lacks space for System Restore, which I forgot to turn on. After I mistakably clicked 'Delete files' 2 hours ago, Recuva recovered ...
- 53
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2
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92
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How to get a list of all URLs in history starting by some prefix in Firefox?
When I type the start of an URL in Firefox, I get an auto-completion of maybe 10 choices.
But on some websites like professional web apps, you may have 30 or 50 links of interest to you and if it ...
- 119
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83
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Add header for requests to particular domains for browser in Windows kiosk mode to supply auth token
Is there any built-in way to provide headers to add to requests for a particular domain in Edge? Or Chrome - or any browser that can be used with Windows Kiosk mode?
I need to authenticate the machine ...
- 268
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109
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Clear Firefox cache and cookies automatically [closed]
To clear the Firefox's cache one must do: Menu - Settings - Privacy & Security - Cookies and Site Data - Clear Data - Cookies and Site Data/Cached Web Content - Clear now. But one must do this ...
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115
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PDFs generated in Chrome do not display well in Firefox
When I generate a PDF from a chromium-based browser and I dispay it in Firefox, all the shadows break.
Nevetheless either if I watch that PDF in chrome itself, or either if the PDF is generated in ...
- 603
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1
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74
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Firefox won't launch with imported profile
I've had this problem before, not sure what fixed it last time, but I'm having it again. I have a root profile folder from my Firefox Nightly backed up. So on a new machine I install Nightly, create ...
- 21
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34
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is there a list of all possible capability.policy for security in firefox
in the about:config or user.js you can set some rules to change firefox advanced settings
I'm interested capability.policy I'm trying to see if there is one specific rule i can change to all some ...
- 21
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2
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198
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How to make Firefox use HTTPS by default but not block plain HTTP traffic if there is no other choice?
Is there a way to get Firefox to automatically visit the HTTPS site instead of the HTTP site, whenever possible? For instance, if I type web.archive.org into the address bar, with no search history, ...
- 1,541
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1
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65
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Why won't Google Chrome really or Firefox capture the network developer request of a form autopost
So imagine this code running on localhost:9080, the page does not render content but instead does a HTML auto post. But I like to use the network tab to see the HTML content rendered under the ...
- 243
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1
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22
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Websites with file-upload scripts (and other capabilities) in Firefox - can they get Thunderbird email identities? (Fedora linux)
I'd like to set up an instance of Thunderbird on a Fedora VM (with a VPN). I want it to use ONLY an alias I have set up with the email providers. I think I can do that with TB settings.
But I will ...
2
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1
answer
94
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Firefox's stopped playing only whatsapp voice msgs. All other audio-video msgs play ok
When I play any voice msg in Firefox's whatsapp-web tab, it doesn't give any sound, even when the sound of all videos in the same Whatsapp tab plays ok. The same voice msg plays ok in mobile or chrome'...
- 347
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1
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28
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How Hide tool bar & bookmarks bar in pop-up windows, Firefox 124 mac OS
I Use Mac OS Firefox as my primary client for Gmail, and I always compose emails in a pop-out window. Ever since Firefox 124, these pop-out windows include the tool bar and bookmarks bar, eating up a ...
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1
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396
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Legacy Portable Firefox to run legacy portable Java only and ignore local install of Java
I have multiple systems that require legacy browsers and Java. I need Portable Firefox to run the Portable Java JRE version and not the Java JRE installed on the OS.
One of these legacy systems is the ...
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35
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Open new tab besides last active non-pinned tab?
I have a productivity web app (ClickUp) as a pinned tab in Firefox. Is it possible to configure Firefox (about:config or via extension) to pretend the pinned tab does not exist when opening a link in ...
- 239
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Is it possible to modify/remove devtoolsKeyset key bindings in Firefox?
I've been working on a locked-down version of Firefox and need to disable certain keyboard shortcuts. Clarification: I'm the employee locking it down for my employer for use by our customers on a ...
- 11
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28
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OS: Parrot Security 6.0 (lorikeet) x8 Automatically end current session
When I open a file which name is " Shiva Svarodaya with Hindi Translation 1899 - Khemraj Shri Krishna Das.pdf " when open with atril document viewer SUddenly I automatically It ends the ...
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1
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101
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No Firefox cookies.sqlite file found. Use -c COOKIEFILE
I try to execute the code by using this command in my Kali Linux python3 ./cookies.py
then I got this message No Firefox cookies.sqlite file found. Use -c COOKIEFILE.
what does the message mean and ...
- 11
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1
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591
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How to set the background color of a PDF file opened in a Firefox browser?
I tried the following way to change the PDF file background color in a Firefox browser (Firefox version 124.0, following an answer from here):
Enter setting with about:config
set pdfjs....
- 51
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0
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53
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Firefox - Allowing about: protocol
i have custom ( new tab page ) and one of the feature i want to add to it is a button that send me to about:debugging or about:profiles tabs
when using a hyper link or create a new tab with url: "...
- 21
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46
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Firefox behaving aways like in no-remote mode in WSLg/Ubuntu
I have a shell script that opens several tabs in default browser for 2fa process (indirectly by using aws sso login). This script runs in WSL2/Ubuntu 22.04.
Now this is interesting: The behavior is ...
- 121
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1
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34
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How can I get rid of unwanted email addresses?
To be more specific, I use Firefox 115.8.0esr (64-bit) on Debian 11, and I sometimes have to authenticate with my email address to use some Google services; for some reason Firefox (or is it Google?) ...
- 399
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40
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Firefox has permission to start wpa_supplicant when calling navigator.geolocation
I've been dealing with some annoying attacks lately, and got super paranoid after discovering wpa_supplicant.service running as it definitely should not be on this particular machine. After a little ...
- 103
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0
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43
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How to list all detected cameras in firefox (offline without a website)?
How can I get firefox to show me a list of all the webcams that it can see?
I do not want to use a website. I want something native in firefox that I can use offline without visiting a third party ...
- 1,566