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

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5
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 ...
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 ...
47
votes
10answers
42k 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 ...
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 ...
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 ...
17
votes
5answers
20k 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 ...
5
votes
2answers
9k views

Where does Firefox store bookmarks?

Does anyone know where Firefox is keeping the details about the bookmarks? For example, when I'm browsing the net and I see an interesting page but I don't have time to read it in that moment, I ...
3
votes
1answer
355 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 ...
112
votes
8answers
419k 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 ...
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 ...
35
votes
14answers
78k 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 ...
5
votes
5answers
46k views

Firefox: Remember new passwords without prompting

How can I make Firefox automatically remember all passwords without prompting?
9
votes
3answers
36k 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 ...
2
votes
5answers
1k 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
88k 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 ...
59
votes
7answers
93k 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 ...
134
votes
8answers
79k 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?
79
votes
6answers
40k 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 ...
17
votes
5answers
11k views

How can I add a Firefox bookmark as toolbar button?

I have a bookmark that I use to 'zap colours' from websites: ...
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 ...
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 ...
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 ...
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 ...
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?
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
4answers
2k views

Reference for all “about”/“chrome” address bar strings for Firefox and Chrome

It there a reference for all the magic strings which one can type on Google Chrome and Firefox? For instance I forgot how to create/show profiles in Chrome beta. I later found that it was ...
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 ...
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, ...
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 ...
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 ...
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 ...
10
votes
7answers
2k views

Log in with two accounts (e.g., in Gmail) in a single Firefox window

I have two Gmail accounts. I'd like to log in to both of them at the same time in a single Firefox window. How would I go about it? I know one suggestion is IETab, but that fix has too much of a ...
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 ...
7
votes
3answers
20k views

How can I set one browser to use JRE 1.5 and another to use JRE 1.6?

I think this has to be a common issue, but I haven't found any clear solution. We have several products that are accessed via a browser (IE 7) with JRE version 1.5. We now need to be able to support ...
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 ...
3
votes
3answers
3k views

Change the default Google search domain [duplicate]

Possible Duplicate: Firefox 3.6 - Navigation Toolbar - Google search box language problem I am currently working from Germany. From Firefox, if I give something to search in the Google ...
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
575 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 ...
7
votes
3answers
3k views

How to switch Firefox channel to Stable?

I have switched to the Beta channel in my Firefox some time ago. Now I want the stable channel back. Unfortunately it is missed from http://www.mozilla.com/en-US/firefox/channel/ My FF:
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 ...
4
votes
2answers
3k views

Block cookies by name, not by site, in Firefox

Firefox allows blocking all cookies on a site-by-site level. This is OK for the most part. However, it does not help with blocking only Google Analytics cookies. The GA cookie names start with __ut. ...
1
vote
1answer
2k views

Change Firefox location bar search engine

I have Firefox 3.5, and for some reason Firefox location bar is using Yahoo as the search engine. I couldn't find a setting in the options to change this. How can I change it back to Google?
0
votes
2answers
6k views

Firefox displays garbage characters in lieu of web page

On this web page http://taj.chass.ncsu.edu/Hindi.Less.05/dialog_script.html, firefox and opera running on windows and linux display the source html interspersed with garbage characters (for me, they ...
65
votes
7answers
125k 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 ...