Mozilla Firefox is a free and open source Gecko-based web browser. It is the current default for the Ubuntu desktop.

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119
votes
8answers
61k views

How do I install the latest stable version of Firefox?

I want to install the latest Firefox on my Ubuntu (64bit) box. What is the best way to do this? Is there a specific update site or should I download the binaries manually? If doing manually, in which ...
73
votes
8answers
44k views

How do I install the Firefox Developer Edition?

Mozilla released the Firefox Developer Edition! How do I install it on Ubuntu? Source: Mozilla Releases 'Firefox Developer Edition' for Windows, Mac and Linux - OMG! Ubuntu!
68
votes
3answers
37k views

what is the file: C:\nppdf32Log\debuglog.txt [closed]

Hello Everyone After I updated to 12.04, a file named " C:\nppdf32Log\debuglog.txt" occurs in my home directory, the content of the file is as the follow: NPP_Initialize : called NPP_GetValue is ...
59
votes
5answers
43k views

How do I put a web application on the Launcher?

Sometimes I see pictures of screenshots with people with web applications and nice icons on their launcher, how can I set this up?
48
votes
4answers
477k views

How to install Flash player on Ubuntu?

Even though I have the latest Adobe Flash player 11.2 for Linux in Firefox - ref: Flash player security doubts - a particular online flash game still requests that I update to the latest flash ...
46
votes
9answers
78k views

How to tell Chrome what to do with a magnet link?

Right now Chrome throws its apron over its head and calls Firefox, which opens the link with rtorrent. What do I need to do to eliminate the Firefox step?
37
votes
4answers
20k views

Is there a work around to get protected Hulu or Amazon Prime instant videos working?

When I went to watch some only episodes of star trek on Amazon Prime, the player would get stuck on updating. I followed the instructions here and doing so actually worked for 3 seconds. It was the ...
35
votes
5answers
141k views

How can I make Firefox open magnet-links in Transmission?

I can't find out how to make Firefox open magnet-links in Transmission. There is no option to make it the standard program for magnet-links in its properties, and as I am not experienced with the ...
35
votes
11answers
75k views

Adobe Flash Plugin is vulnerable/outdated in 14.04 but there is no update in Firefox

I am using Ubuntu 14.04 LTS. When I open a site which requires flash plugin (e.g. Youtube), Firefox says This plugin is vulnerable and should be updated. However if I click Check for updates... ...
32
votes
10answers
2k views

Can I make links to email addresses open Gmail instead of Evolution?

When I click on a link to an email address in Firefox or Google Chrome a "Welcome to Evolution" screen appears. Can I make Gmail open instead, or at the very least disable Evolution from running?
30
votes
2answers
27k views

Why can't Firefox run local .swf files?

My goal is trying to run .swf files through Firefox and NOT a standalone player. When trying to run local .swf files on Firefox 29.0 (currently on 14.04), the browser opens the Open With/Save File ...
30
votes
1answer
13k views

Firefox Middle Mouse Button Scroll

How can I get the middle mouse button to behave correctly in Ubuntu? Clicking the middle button does not show the arrow which allows me to scroll the page by moving the mouse. Information: Firefox ...
30
votes
3answers
19k views

What does the Ubuntu Firefox Modifications extension to firefox do?

I'm presently running Firefox 3.6.8 on Ubuntu 9.04. My Firefox extensions include Ubuntu Firefox Modifications 0.9rc2. I've upgraded Firefox on this install a few times; as far as I can recall, some ...
29
votes
21answers
95k views

How can I access Flash files from streaming websites?

In Maverick, there was an option to download Flash videos from sites like YouTube, Vimeo, etc. by copying the flashxx** file in /tmp directory to another location before closing the window. But in ...
27
votes
2answers
9k views

What does “Would you like to install Twitter” mean?

Firefox in Ubuntu 12.10 pops up messages such as (similar messages for Reddit, Facebook, etc.): "Would you like to install Twitter for extra features and quicker access?" What do they mean? What ...
26
votes
2answers
142k views

How to install the Java plugin for Firefox?

I am trying to install Java and plugins for Firefox. I installed both the JDK and JRE. When I try with the sudo update-alternatives --config java command it shows only one choice available. Plugins ...
26
votes
3answers
44k views

How do I launch a remote firefox window via SSH?

When I SSH to a remote box $ ssh -X remotebox then start firefox on the remote box remotebox$ firefox and I have firefox running on my local machine, a local firefox window will open. no firefox ...
26
votes
7answers
57k views

Compatible version of “Adobe Shockwave Player?”

Is there a Ubuntu compatible version of the "Adobe Shockwave Player?" I'm running Firefox and when I try to bring up one of my School's websites it says missing plugin. When I click on "Install ...
25
votes
7answers
36k views

How do I fix Flash issues?

I am having problems with Adobe Flash in Ubuntu, what are my options?
24
votes
3answers
1k views

Why isn't Firefox 8.0 available as an update in the Update Manager?

So recently I've read that Firefox 8.0 is out, thought of updating, opened the Update Manager, refreshed the sources, but there was no uodate. Is there a particular reason for that?
21
votes
3answers
3k views

“Shockwave Flash is known to be vulnerable” warning

Good evening! Today, I turned off my computer without any problems and went out. When I came back and tried to surf the net, I saw that my firefox started giving me this problem: "Shockwave Flash is ...
21
votes
2answers
1k views

Why is natty-proposed suggesting an upgrade to a beta version of Firefox?

Well I loaded up update manager today and it wants to replace Firefox 4.0.1 with 5.0beta5. To double check I fired out apt-cache policy firefox and there it is: ...
20
votes
5answers
57k views

How do I open “apt” links in Firefox (in Lubuntu)?

Many answers on Ask Ubuntu direct to links like this that in Xubuntu opened in Ubuntu Software Center. In Lubuntu I get this error message: In Firefox-Preferences/Applications cannot see something ...
20
votes
5answers
15k views

Firefox cannot draw the new Google Maps

Google released the new Google Maps. Unfortunately, it doesn't work on Firefox 21.0 on Ubuntu 13.04. When I open the page, Firefox just draws white grids on the screen. Dragging or clicking the ...
19
votes
6answers
64k views

Removing Firefox in Ubuntu with all add-ons like it never existed

I have been using firefox for a long time in Ubuntu, I downloaded some add-ons but it made firefox extremely slow, even if I remove them nothing will change. I tried to remove firfox also but ...
19
votes
2answers
899 views

How to remove `t=canonical` from Firefox browser searches made on DuckDuckGo?

In Ubuntu 14.04, when I do a search in Firefox using either the address bar or the search bar, the system always adds t=canonical to my searches. So the full string becomes: ...
19
votes
3answers
6k views

How can I use firefox to take full page screenshots from command line?

I need to take a screenshot of a whole web page. I have seen How can I take a full page screenshot of a webpage from the command line? where many ways to take a screenshot are proposed but I need to ...
19
votes
5answers
5k views

How can I change Firefox's default dictionary?

It's aboot time I asked this one. Firefox thinks I'm Canadian. I've got absolutely nothing against Canadians and their spelling is a lot better than Americans' but I don't spell specialised with a z. ...
18
votes
6answers
12k views

How to know each TAB memory usage ?

Hi, is it possible to know that, if Firefox or any browser is opened, whats the amount of memory taken up by each TAB of web-browser ? I am just curious to know.
18
votes
2answers
18k views

How do I play movies on Google Play?

When trying to play a movie I purchased from Google Play, the movie player (same Flash-based one used by YouTube) spits out the following error message over a background of faux-TV-static: An ...
18
votes
4answers
4k views

How can an application (like Firefox) be forced to use a certain network interface?

I've two interfaces: eth0 and wlan0 on a notebook. Possible use cases: eth0 grants me Internet access, and wlan0 is currently connected to a router which does not have Internet-connectivity. For ...
17
votes
3answers
8k views

How do I enable overlay scrollbars in Firefox?

I like the overlay scrollbars that come with natty beta 2 by default! How do I enable them on fx4?
17
votes
5answers
19k views

How to hide Firefox titlebar in Gnome Shell?

I am running Gnome-shell 3.2 in Ubuntu 11.10. Is there a way to hide the firefox title bar and make it like Chrome's ? I would need the min/max buttons in tab-bar. There was a tutorial in webupd8, but ...
17
votes
0answers
5k views

How can I get Firefox to work with the global application menu? [closed]

I've been following the progress of getting Firefox (and Thunderbird) working with the global application menu, how can I test and follow along it's progress?
16
votes
4answers
8k views

Disable CTRL+Q in Firefox without keyconfig extension

How do I disable the Ctrl + Q shortcut in Firefox without using the keyconfig extension?
16
votes
3answers
70k views

Where is Firefox's plugins directory?

I know that there are extensive, "proper" methods for installing Firefox plugins. However, I would like to know where the folder is for linking shared-object (.so) files, such as libnpjp2.so and ...
16
votes
5answers
4k views

How to use American English spelling dictionary in Firefox?

My Firefox spellchecker was complaining this morning that I spelled 'neighbor' in the American English style, not the British English style ('neighbour'). Same is true for color (colour), analyze ...
16
votes
2answers
3k views

How to get back unity webapps to firefox integration?

I can't believe that there was not a question or open issue for this before. I've recently installed ubuntu 14.04 along with my favourite webapps; and I, unfortunately, realised that they're not ...
15
votes
5answers
12k views

Add certificate authorities system-wide on Firefox

I want to add some root CAs that doesn't come with the default firefox on Ubuntu, but I don't know how. I tried adding them to the local certificates with certutil, but it didn't work. It messed up ...
15
votes
3answers
26k views

Mozilla Firefox terribly slow on Ubuntu 14.04

It is being observed since my upgradation to Ubuntu 14.04, that the Firefox browser is terribly slow. Can anything be done about it?
15
votes
3answers
25k views

High CPU usage while playing Flash

When I play video on YouTube CPU usage rises to 100% in both Firefox and Chrome. What I'm running: Processor Intel Core2Duo E4500 2 x 2.2GHz Ubuntu 12.04 amd64 with latest updates Flash Plugin ...
14
votes
4answers
35k views

Moonlight extension not working with new Firefox versions

The web browser I use is Firefox (currently in version 8 in Oneiric). According the Compatibility Check information the Moonlight extension is not compatible with FF8. Anyway, I enabled this extension ...
14
votes
1answer
4k views

How can I use Firefox's built in PDF viewer?

I downloaded firefox 19 and executed it on my Ubuntu 12.04 machine. I went to a website with pdf links, clicked on one of them, hoping to have it shown in the built-in pdf viewer in Firefox 19, but ...
14
votes
3answers
10k views

Firefox: open downloaded files with system default application

When I download a file with firefox, it always asks me with what program I want to open it with, even when that type of file is recognized by the system, and I can double click on it in Nautilus and ...
13
votes
3answers
20k views

Adjust Firefox and Thunderbird to a High DPI touchscreen display (retina)

If you are using a high DPI Display with a resolution of 3200x1600 px you can adjust Unity with a System wide Menu and titlebar scaling But Firefox is not really ready for this: All pages and the ...
13
votes
3answers
5k views

Firefox's “Open folder” opens Gwenview

Upgrading to 12.04 caused some problems to my Firefox. It seems like that Firefox doesn't know how to handle downloads. After some researches, I've found this solution : Kubuntu 12.04 Firefox and ...
13
votes
4answers
4k views

Why does Firefox try to use Gedit to open .deb files

I am running Firefox 15 on Ubuntu 12.04. If I go to a website with a .deb link, Firefox downloads the file, then tries to open it with gedit. If I use Nautilus to open the .deb file, it runs it in ...
13
votes
4answers
25k views

How to install Firefox addon from command line in scripts?

I want to improve my unattended script adding some Firefox addon, however I cant find the way, Can someone help to find out how to? Example: (Want to install adblockPlus plugin and set a new ...
13
votes
2answers
20k views

Force Enable Hardware Acceleration in Firefox

Currently, in about:support (Firefox 30) the "Graphics" section states the following: Now, I know that Firefox has (for whatever reason) disabled the hardware accelerated features for Linux users. ...
12
votes
6answers
3k views

Firefox “clone” for Ubuntu

In Windows I use, beside the main Firefox installation, one or even two "Firefox clones" for different purposes (specifically oriented addons and configurations, light configuration without addons, ...