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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351 votes
16 answers
218k views

How can I clear a single site from the cache in Firefox?

In Firefox, I occasionally need to clear my cache to fix a website. But clearing the entire cache seems like extreme overkill. Is there any way to just clear the one site from my cache?
Ryan C. Thompson's user avatar
331 votes
12 answers
123k views

Determine which tab in Firefox is using CPU resources?

Is there anything in the current Firefox similar to the Task Manager in Google Chrome? (Shift + Esc) There is something that occasionally takes up enough CPU to make Firefox unresponsive - but with ...
chris's user avatar
  • 9,375
311 votes
9 answers
120k views

Clear 301-redirect cache in Firefox

Is it possible to clear only 301-redirects from Firefox's cache? CTRL+F5 doesn't do the job since you just reload the target without caching but do not clear the cached redirect. An option to disable ...
ThiefMaster's user avatar
  • 6,266
233 votes
20 answers
137k views

How to add a custom search engine to Firefox?

Is there a way I can add a custom search URL to the Firefox search bar? e.g. I'd like to provide a URL such as http://blahblah.com?search=%s, where Firefox replaces the %s with the content of the ...
Andrew Grant's user avatar
  • 2,734
220 votes
3 answers
33k views

How can this website reidentify me even after deleting all of my browser's history and using a VPN?

The website dropmail.me is able to successfully reidentify me (and offer my last used temp mail addresses via. "Restore access") despite doing the following: Delete all my browsers history which ...
manuel's user avatar
  • 2,018
179 votes
11 answers
547k views

How to download favicon from website?

When you browse a website, the "favicon" icon shows up in the tab or next to the URL (or next to the bookmark). If I want that graphic, is there a way to download it directly from the site? I'd ...
Robert Cartaino's user avatar
160 votes
6 answers
36k views

All of my Firefox add-ons have been disabled suddenly, how can I re-enable them?

All of my Firefox extensions were spontaneously and simultaneously disabled (converted to Legacy status) a few moments ago. How can I re-enable them? Firefox 66.0.3 (64-bit)
jonsca's user avatar
  • 4,062
136 votes
6 answers
51k views

Firefox doesn't allow to paste into WhatsApp web anymore?

Since today, with Firefox, I cannot paste text into the text input field of whatsapp.web (the PC version of WhatsApp) anymore. the version is FF 116.0.2 (64-bit) on Windows 10, previous versions of FF ...
Vickel's user avatar
  • 1,121
133 votes
2 answers
118k views

How can I override the CSS of a site in Firefox with userContent.css?

In Mozilla Firefox, I want to create userContent.css which overrides the CSS of a site. Where should I create the file (Windows 7)?
Rauf's user avatar
  • 3,677
129 votes
11 answers
559k views

How to install the real Firefox on Debian?

Debian 6 ("Squeeze") uses a rebranded version of Firefox called Iceweasel. It, however, lacks plugin support, and most of my favorites don't work. So what is best way to install the "real" Firefox on ...
kravemir's user avatar
  • 2,664
128 votes
16 answers
124k views

How do websites block selecting text and how do I unblock that?

There's a website (example) that somehow blocks selecting text. Also it blocks Ctrl+A to select everything, there is also no “Copy” in the popup menu. What I have tried: Some sites use JavaScript to ...
user6329530's user avatar
  • 1,431
128 votes
2 answers
16k views

Why does Firefox use the "chrome://" protocol / schema in URLs? [duplicate]

When I want to configure an addon, for example Ghostery, the tab shows a URL like this one: chrome://ghostery/content/options.html What does it mean? Does it have something to do with the Chrome ...
ChocoDeveloper's user avatar
125 votes
5 answers
22k views

How do these icons work: 🌍🌎🌏✅️?

I can see these characters as colored icons: 🌍🌎🌏✅️ It only works in Firefox for me. If you can't see the characters in color, it looks like this on my system (it's probably font-dependent): I ...
Tomáš Zato's user avatar
  • 4,474
125 votes
9 answers
78k views

How do I make Firefox forget HTTP Basic Auth?

How can I make Firefox "invalidate" it's saved HTTP Basic Auth credentials for a website from the client side? Currently, I have to restart the browser, which is rather cumbersome with multiple tabs ...
MiffTheFox's user avatar
  • 3,442
115 votes
6 answers
551k views

Is there an "about:config" (Firefox) In Google's Chrome?

Anything similar to "about:config" (Firefox) In Google's Chrome ?
joe's user avatar
  • 12.4k
115 votes
1 answer
71k views

How to order windows of the same program on taskbar [duplicate]

I'm using Windows 8 and appreciate the ability to reorder my programs at will in the taskbar. However, for different windows of the same program - I have three Firefox windows, for instance - I can't ...
antialiasis's user avatar
  • 2,179
113 votes
23 answers
136k views

Is there a method to export the URLs of the open tabs of a Firefox window?

If I have a Firefox window open that contains 10 tabs, is there a way in Firefox or by a plug-in to get the URLs of those 10 tabs as a text file or some other format? Right now if I want to do this I ...
hekevintran's user avatar
  • 2,717
105 votes
4 answers
51k views

How do I search a page using a regular expression in Firefox?

I want to use regular expressions to search a page in Firefox. Is this possible?
BrunoLM's user avatar
  • 5,654
97 votes
13 answers
30k views

Switching back to last tab on Firefox

Is it possible to switch back to the last tab used (tab toggling)? I often like this behaviour on the Mac OSX when switching between apps with the CMD + Tab shortcut key.
Dashed's user avatar
  • 1,097
96 votes
3 answers
14k views

How does Firefox know my ISP login page?

To access the Internet, I have to log in at my ISP-provided login page which is a private IPv4 address (192.168.xx.xx). If I open Firefox without logging in to that account, Firefox shows this ...
Biswapriyo's user avatar
  • 11.2k
96 votes
11 answers
21k views

How to forbid keyboard shortcut stealing by websites in Firefox

Many websites, especially everything involving rich text editing (this site is guilty as well), steal keyboard shortcuts normally used to control Firefox and make them do something else instead. It is ...
taw's user avatar
  • 1,947
93 votes
2 answers
46k views

Is there a way to identify the busy (CPU-consuming) tab in Firefox? [duplicate]

Sometimes there's a nasty, guilty, CPU-hogging tab in Firefox that's maxing one of my CPU cores and making the whole browser sluggish. I'd like to find it and close it. Sometimes I get lucky, but ...
gojomo's user avatar
  • 1,116
92 votes
6 answers
99k views

How to hide tab bar (tabstrip) in Firefox 57+ Quantum

How to hide/disable/remove the tab bar in Firefox 57+ ("Quantum")? The goal is to just hide the tab bar totally. Useful if paired with extensions like "Tree Style Tab". Note: there ...
VasyaNovikov's user avatar
  • 3,486
92 votes
6 answers
21k views

How to disable Ctrl+Q shortcut in Firefox on Linux

Since Firefox 57 there is no way to disable Ctrl+Q shortcut by plugin on Linux (see this bug). All workarounds I've found are based on setting the global Ctrl+Q shortcut to "steal" it from Firefox. ...
rob006's user avatar
  • 1,121
90 votes
1 answer
8k views

Strange dotless decimal notation of IP address... How does it work?

Earlier today I thought I had a URL in my clipboard, but I actually had four 9 digit integers copied from a spreadsheet, which were identification numbers from a proprietary system. Completely ...
beeks's user avatar
  • 1,082
88 votes
2 answers
14k views

How to disable address bar expansion in Mozilla Firefox 75?

With the latest update to Firefox, there is a feature that I would like to disable. When you open a window/tab or place the cursor in into the address bar, it becomes a bit bigger. How can I disable / ...
automatix's user avatar
  • 1,411
87 votes
7 answers
133k views

How to sync bookmarks across Google Chrome and Mozilla Firefox bookmarks?

How to sync bookmarks across Google Chrome and Mozilla Firefox bookmarks? As I currently understand, Google Chrome puts bookmarks separately from Google Bookmarks, which is accessible in Firefox by ...
ViliusK's user avatar
  • 1,770
85 votes
9 answers
162k views

How to take a screenshot that includes a scrolling element within a web page in Firefox?

I need to take a screenshot of an entire webpage. The trick is that I need the screenshot to include the entire contents of a single element that does not fit in the screen. It is a single ...
End Anti-Semitic Hate's user avatar
85 votes
8 answers
72k views

Does Firefox still have the 3D DOM viewer?

I can't seem to make out this little feature that was once there in Firefox. The 3D button that was there in an earlier version of the dev tools is gone and I can't seem to find any trace of this ...
MildlyInteresting's user avatar
83 votes
1 answer
16k views

Is it possible to leave Firefox open when closing its only tab?

I am using Firefox 59.0.2 (64-bit) on Ubuntu 16.04 (Xenial Xerus). When there is only one tab opened in Firefox, closing the tab will also close the web browser. This is contrary to that in Chrome ...
Tim's user avatar
  • 17.3k
81 votes
7 answers
11k views

How to block Hot Network Questions in the sidebar of Stack Exchange network?

Operating system is Ubuntu 14. Firefox is 50.1.0 This is what I have tried: I restarted firefox after that. There was no effect. What is the way to block those hot questions on the sidebar?
Aquarius_Girl's user avatar
80 votes
7 answers
349k views

How to bypass the "secure connection failed" warning in Firefox 33

Since installing Firefox 33 a "Secure Connection Failed" error is no longer bypassable using the "I Understand the Risks" button - it's gone! Is it still somehow possible to ignore certificate errors?...
RienNeVaPlu͢s's user avatar
73 votes
10 answers
152k views

How to turn off the Firefox cache?

I'm using Firefox 3.5.2. For some reason, it has cached a page and won't update. For example, I added an alert('test'); statement to some JavaScript code which is loaded on the page, but Firefox doesn'...
Click Upvote's user avatar
  • 4,200
71 votes
12 answers
158k views

Force-refreshing only JavaScript files in Firefox and Chrome

I want to clear only JavaScript files from my web browsers (Firefox and Chrome). I am doing JavaScript debugging, and it's annoying that my JS just won't get updated whenever I change my JS files. The ...
Graviton's user avatar
  • 5,680
65 votes
4 answers
23k views

Disabling the "Enable notifications?" popup in Firefox

If I'm on a page that has web notifications (like Slack or others), Firefox asks me if I want to enable them. However, my choices are "Yes" or "Ignore for now". The problem is, if I select "Ignore", ...
bright-star's user avatar
  • 1,589
65 votes
9 answers
14k views

How do I make Firefox spellcheck in multiple languages simultaneously?

I want Firefox to assume that text may be in a mixture of languages and words should be looked up in multiple dictionaries. (For example, everything in en-GB, en-US, ru, be and be-classic should be ...
Vi.'s user avatar
  • 17.2k
64 votes
11 answers
135k views

Firefox hide everything except content area of the browser

Is there a possibility to hide all borders and bars in firefox like address bar, navigation bar, window title and tabs, so the remaining area is just the content area of the browser? I would like to ...
uloco's user avatar
  • 866
64 votes
5 answers
52k views

How to switch back to Firefox' old style of tabs?

The recent update (89 I think) causes all tabs to render in the same continuous shading, which makes it somehow more difficult to spot each tab's start and end (regardless of the favicon, I'm sorry, ...
Tobias Kienzler's user avatar
64 votes
3 answers
130k views

Is there a Chrome equivalent for Firefox's multi-account container extension?

I just found out about Firefox's multi-account container extension. For those unfamiliar, this is a good overview...https://youtu.be/Gy7lyvAfOSw. It seems like a fantastic solution for being able to ...
A. Ro's user avatar
  • 857
63 votes
2 answers
16k views

Disable two-finger swipe on Firefox

When I scroll along the page or some scrollbox with two fingers on MacBook Pro touchpad, and it can be no longer scrolled to the left, Firefox decides I want to go back in history. What can I do to ...
toriningen's user avatar
62 votes
13 answers
225k views

How can I get a new browser session when opening a new tab or window on Firefox/Chrome?

When opening new Internet Explorer window, a new browser session is issued. Therefore you can login with two different accounts on the same service (let's say Gmail). The same does not apply when ...
Mercer Traieste's user avatar
62 votes
10 answers
136k views

How to convert a webpage to PDF with preserving its look (exactly as on web browser) and text/links?

I'm looking for a way to convert a webpage to PDF, but preserving the webpage's look. Also preserving webpage's text (being selectable), searchable [Generating image screenshot for the webpage would ...
Omar's user avatar
  • 1,763
61 votes
5 answers
163k views

Prevent automatic redirects in Firefox

Firefox used to prevent automatic redirects and have a button you could use to opt-in to a redirect. However, a update a couple of months ago eliminated this feature and now Firefox (version 35) ...
Tyler Durden's user avatar
  • 6,121
60 votes
9 answers
72k views

Can I hide native tabs at the top of Firefox?

I've started using Tree Style Tab on Firefox. It's a great solution for cases where you have many, many tabs and you want to add some level of organization to it. It's becoming increasingly ...
Cauder's user avatar
  • 785
60 votes
1 answer
29k views

How can I block the “Sign in with Google” prompt on websites? [duplicate]

On many websites that require login, those annoying Google login prompts appear: There are several tutorials on the Internet on how to avoid this, for example, this one on How-To Geek, which suggest ...
jay.sf's user avatar
  • 731
58 votes
6 answers
46k views

How to run a regex search on Google Chrome or Firefox?

How can I search for expressions like 'foo|bar' on webpages using browsers like Google Chrome or Firefox?
719016's user avatar
  • 4,337
58 votes
8 answers
54k views

Change key bindings (keyboard shortcuts) in Firefox 57

Since the Firefox 57 (Quantum) update all AddOns which allowed to change key bindings in Firefox seemed to have stopped working/being supported. Is there a method to change the default key bindings in ...
Finn's user avatar
  • 1,001
57 votes
6 answers
62k views

How to make the about:blank page black or any other color in Firefox?

Is there a built-in way in Firefox to blacken or to colour the about:blank page? Will I maybe save some energy by doing so?
leymannx's user avatar
  • 826
57 votes
10 answers
28k views

Manually add username/password to Saved Password list?

I logged into Mozilla's Bugzilla. I noticed Firefox did not save my password. How do I manually add my username and password to Firefox's Saved Password list?
jww's user avatar
  • 12.1k
57 votes
1 answer
2k views

How is a program that's not in my path being run? [duplicate]

Possible Duplicate: Why am I able to execute a program that is not in my PATH environment variable? I was teaching a coworker about %PATH% and found that if I run "Firefox", it works, but was ...
Mathew's user avatar
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