Open-source web browser. Include tag of operating system if it's important/dependent.

learn more… | top users | synonyms (7)

6
votes
2answers
6k views

How to disable javascript modal popup ads

For many years I have blocked popup ads with AdBlock Plus. But it seems more and more these past couple months there is a "new" kind of popup overtaking the web. They are javascript based "modal" ...
47
votes
5answers
7k views

How to Determine which Firefox Add-ons are Using the Most Memory

I love Firefox for its add-ons. I have a lot of them installed, which obviously increases memory use. But it seems that some add-ons are better than others in that department. Does anyone know a way ...
112
votes
9answers
426k 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 ...
81
votes
7answers
41k views

Determine which tab in Firefox is using CPU resources?

Is there anything in the current Firefox similar to shift-esc in Google Chrome? There is something that occasionally takes up enough CPU to make Firefox unresponsive - but with multiple windows, each ...
27
votes
9answers
19k 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 ...
18
votes
2answers
1k views

Is it possible to get old suggestion system back in Firefox 43.0?

With the new update, the first suggested link is just domain. In older versions, the first suggested link was the page I visited the most and I got used to this great feature. Is it possible to ...
40
votes
8answers
5k 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 ...
36
votes
14answers
79k views

Change the white background in webpages to another color

I'm currently using a dark theme in Firefox. It looks really nice, but many webpages use a plain white background. The resulting contrast is a little unpleasant and sometimes hurts the eye when I ...
49
votes
10answers
44k 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 ...
9
votes
3answers
37k views

How do I change Firefox's user agent via about:config?

My work has blocked Internet access with Firefox. I know how to change the value of “general.useragent.extra.firefox” through about:config, but when I try to change it to IE, I still can’t access any ...
16
votes
5answers
4k views

Firefox: Using multiple instances with different profiles?

Let's say, Firefox's instance is running with profile 1. Is it now possible, to start a new Firefox instance with profile 2? Normally, when Firefox is already running, no new instance is created. ...
6
votes
6answers
5k views

How do I tell Firefox to only keep persistent cookies from sites I want?

Is there a way to tell Firefox to only keep persistent cookies from sites I want? I don't mind "session cookies" from all sites, but persistent cookies, I only want from a handful of sites to "keep ...
3
votes
1answer
371 views

Certain Windows 8.1 desktop apps will not start

I'm using a 64-bit Acer laptop running Windows 8.1. When I try to start certain desktop apps, I get the error message (translated:) This application could not be started because the Side-by-Side ...
2
votes
5answers
2k views

Is there any way to disable a YouTube video from automatically starting in Firefox?

I have a couple of videos open on Firefox. As I refer to them often, I prefer to keep them as a tab rather than as a bookmark. However, every time I reboot Firefox, they start to play. Can I have them ...
241
votes
3answers
89k views

How can I simulate a slow connection, or limit the bandwidth that Firefox can use? [closed]

Is there a way I can simulate various connection speeds from within Firefox? I need to be able to check http://localhost with varying speeds. I know there are standalone applications that can do ...
15
votes
6answers
18k views

“Task Manager” addon for Firefox?

Are there any addons for Firefox that can replicate the performance monitoring of Task Manager in Windows - seeing memory and CPU used - but for all the tabs in the current Firefox session? I want to ...
25
votes
3answers
7k views

How to findout which firefox tab is using most CPU or memory? [duplicate]

There are times when the firefox responds reluctantly. And it is not only when i have opened many tabs. But there are cases when i have opened as many as 20 tabs and firefox is working fine and there ...
17
votes
5answers
21k views

How to block annoying facebook and other social network widgets

We have facebook buttons, twitter buttons, linkedin buttons, google+ buttons, stumbleupon buttons, younameit buttons. These social network buttons and widgets are creeping up the internets like the ...
12
votes
6answers
11k views

Can I switch the User-Agent header for only a single web site?

I have to use a particular web site for work, but this web site checks to see whether I'm using Internet Explorer and, if not, won't allow me to log in. I can switch my User-Agent header using the ...
2
votes
3answers
10k views

Keyboard shortcut to quickly jump to the URL address field in Firefox

In Firefox I very often want to quickly enter a new URL in the address field. Therefore it would be very nice to be able to quickly jump to the URL address field with a keyboard shortcut! Today I must ...
137
votes
8answers
81k 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?
14
votes
6answers
20k views

Change the default search engine for Firefox's address bar

I love the ability to just type something into Firefox's address bar and do a Google search. But I was wondering if there was some way to customize what search engine Firefox used?
11
votes
6answers
7k views

How to recover form information for a webpage in Firefox

I filled out a lengthy form on a webpage which rejected my submission due to a server error. I can't seem to recover the form input. Is there any way in Firefox to look into caches, history, etc. to ...
10
votes
8answers
9k views

How can I block all Facebook elements/content

I have no Facebook account. How to block all Facebook elements (not only like-button, but everything Facebook) on the rest of the Internet. I worry being tracked by Facebook. I am using Firefox on Mac ...
4
votes
5answers
5k views

Firefox on Mac: Slow, slow, slow

On my Macbook, Firefox is slow. Really slow. It takes about 30 minutes to start up - when I wake up, I start it, and once I am done breakfast, it's usually done. And, it takes a super-duper long time ...
10
votes
5answers
10k views

How to open a list of URLs in Firefox or SeaMonkey?

I have a list of URLs in a text file, for example, http://url1 http://url2 http://url3 I wonder how to open them each in one tab in Firefox (or SeaMonkey), without the hassle of creating a new tab, ...
9
votes
4answers
5k views

Tool to highlight and annotate text on websites? [closed]

When I read something I need to underscore what I like, or what I think is important, and to take notices about that read, near on that current paragraph. So, does anyone know a Firefox add-on or ...
10
votes
4answers
8k views

How to Set Firefox 4 to only store History for a set period of time, i.e. one day?

I want to setup Firefox 4 to only store my history for 1 day (or some other set period of time), but I can't seem to find an option to do that in the options dialog, all I can see is "Remember History"...
7
votes
1answer
5k views

Prevent auto-loading of tabs in Firefox when starting browser

I use Tab Mix Plus, and I have the following settings set: "Don't load tab until selected" in Tabs dialog of Firefox is set The "Reload all tabs" in TMP is unselected The setting browser....
1
vote
1answer
1k views

What are the 'chrome:' and 'resource:' protocols in Firefox?

From reading the error console, I've noticed that Firefox has several internal protocols, such as chrome: and resource:. What are they used for, and why are they necessary? Are they part of the ...
8
votes
11answers
13k views

How to maintain different active sessions in single firefox and internet explorer?

Suppose we are working in Firefox. Now I have opened 3 tabs. In all 3 tabs I need to work on an application e.g. gmail account. i.e. Tab 1 has Account 1, tab 2 has account2 and tab 3 has account 3. I ...
4
votes
1answer
3k views

Is it possible to route only a specific application through a VPN?

I've recently purchased a VPN from vpntunnel.se and was wondering if it was possible to use it for specific applications (Firefox, xchat etc) Also i'm having a little trouble setting up the the VPN ...
11
votes
3answers
2k views

Locate bookmarks folder after finding bookmarks in Firefox

When I search bookmarks I can't find a way to locate the folder of the result. I have many bookmarks folder and subfolders and most folders and subfolders contain some bookmarks. When I cannot ...
8
votes
2answers
587 views

What do the acronyms mean after the slash in the Firefox dictionary?

What do these capital letters mean after the / character in the en-US.dic file found in the \Firefox\Dictionaries folder? For example: collectivism/M collectivist/MS collectivity collectivization/M ...
6
votes
2answers
5k views

How does precise GeoLocation in HTML5 work?

This is quite a long winded question, you can just skip to the last sentence if you don't care about the background info. I just tested out HTML5 geolocation using Firefox 3.5+, and it managed to ...
59
votes
7answers
94k 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 seperatly from Google Bookmarks, which is accessible in Firefox by ...
65
votes
7answers
126k 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'...
111
votes
2answers
10k 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 ...
36
votes
9answers
11k views

Flash overrides Firefox keyboard shortcuts — how to turn that off?

I often cycle through my Firefox tabs using Ctrl+Tab and Ctrl+Shift+Tab. But whenever it reaches a tab that is running a Flash (or similar) plugin, Ctrl+Tab and Ctrl+Shift+Tab won't work anymore, ...
32
votes
2answers
24k views

How to 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, say this one. Where should I create the file? Could you please describe it based on Windows 7?
17
votes
9answers
6k views

How to save a bookmark in Firefox with POST data?

I would like to save as a Firefox bookmark a page which is not accessible using GET. The only way to retrieve the page is to send some POST data. For example, I would like to bookmark a Chronopost ...
49
votes
7answers
159k 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?...
24
votes
2answers
6k views

How do I recover a form in Firefox *without* installing a plugin? [duplicate]

Possible Duplicate: How to recover form information for a webpage in Firefox I typed a couple of paragraphs on a discussion board, but when I clicked the submit button, the site was undergoing ...
24
votes
3answers
2k views

How do I prevent pages I visit from overriding selected Firefox shortcut keys?

In Firefox, how can I prevent pages from overriding Firefox built-in keyboard shortcuts through Javascript on a per-key basis? Preferably on a per-site basis, too? The most frustrating override is the ...
11
votes
1answer
3k views

How to allow a script to run on a single domain with NoScript?

Some forums allow direct embedding of YouTube videos, and this is slowing down my browsing a lot when a user posts several videos in a single post. I want to allow scripts from YouTube only on youtube....
58
votes
10answers
88k 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 ...
9
votes
7answers
991 views

Is there a way to reduce the memory usage of Firefox?

On my notebook with 2GB and Windows XP, Firefox 3.5.2 uses about 150MB of the memory with 4 tabs open. Is there a way to reduce the amount of memory that Firefox consumes?
10
votes
4answers
23k views

Does Chrome use a different DNS server from Firefox and IE which use the OS default?

Is the common set up for Chrome that it will use a different DNS server, while Firefox and IE will use the OS networking default? My Chrome (including one on virtual PC) will sometimes show "...
8
votes
5answers
17k views

Website downloader (cache?) to view sites offline

Is there a portable way to download or cache all pages of a website for viewing offline? I have a cross country flight tomorrow, and I'd like to be able cache a few webpages (particularly the python ...
6
votes
2answers
2k views

How does browser know how much page has been loaded?

Looking at the progress bar of browser which sometimes slows down near the end during a web-page loading, I was wondering whether the browser shows progress based on the size of elements present on ...