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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How to uninstall ffmpeg installed via Firefox addon YouTube Video and Audio Downloader 0.5.2?

Firefox Addon YouTube Video and Audio Downloader 0.5.2 URL is https://addons.mozilla.org/firefox/addon/youtube-video-and-audio-dow/?src=api. After ffmpeg is installed, YouTube Downloaders (YouTube-dlg,...
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20 views

Firefox change theme automatically

My firefox changed the theme without me choose. How can I go back to the default theme? I uninstalled and installed again but not resolved.
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9 views

Force Epiphany to open links in default browser

I use Firefox as my default browser and I started using Epiphany for web apps (I use it fox google inbox) as I prefer it as a separate window with it's own icon. What I don't like about it is that ...
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36 views

Firefox fails to start after upgrading

I was running Ubuntu 15.04. Knowing that the newest version is 16, I tried to upgrade today. In the update setting in Software Center I've chosen "Any new Ubuntu version". Then I run "sudo apt-get ...
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9 views

Uploading files online: external drives not visible ubuntu 16.04

First here's what I'm using. Ubuntu server 14.04. Ubuntu client 15.10 and 16.04 both recently updated. Mozilla Firefox as browser. I have a problem When uploading items online. When browsing files ...
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31 views

Firefox crashes randomly

This happens 75% of the time whenever I open a page: Add-ons: ubufox%40ubuntu.com:3.2,%7B972ce4c6-7e08-4474-a285-3208198ce6fd%7D:47.0,firefox%40getpocket.com:1.0.2,loop%40mozilla.org:1.3.2,...
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25 views

file attachments (i.e. in mail) do not work after system update

I recently upgrate my kubuntu machine and currently I am using Linux version 3.13.0-88-generic (buildd@lgw01-16) (gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) ) #135-Ubuntu SMP Wed Jun 8 21:...
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41 views

Unable to open torrent sites in firefox on ubuntu

I am unable to open torrent websites using Ubuntu 14.04 but it working well in my Windows. I have a dual boot system and I'm new to Linux distros. While opening the message it shows the following ...
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53 views

Firefox 47 not starting on Ubuntu 14.04.4 LTS64 bit Trusty

I am unable to run Firefox 47 with Xvfb on Ubuntu 14.04.4 LTS 64 bit Codename Trusty. I have installed this VM on Windows 7 host with vagrant and Virtualbox as provider. I have problem running google-...
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30 views

How do you cancel an installation of Chromium web browser in unbuntu?

I downloaded chrome from the preloaded firefox browser and deleted it to replace it with chromium web browser from the software center because chrome was from a third party. The Chromium installation ...
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14 views

Can't login to or with Google in Firefox of Lubuntu: Redirect loop

I get locked into a redirect loop whenever I try to login to Google and also here at Stackexchange when I want to login with Google. I type in my email address, get the proper naming and add my ...
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11 views

Firefox opens external PHP links as files in new tabs in lubuntu

In a fresh install of Lubuntu Firefox refuses to handle javascript constructed external calls with the PHP extension as part of a natural HTML page as most browsers do. Instead it attempts to open it ...
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715 views

Error: cannot open display firefox in linux

When I run firefox in bash, I am facing this : Error: cannot open display or Error: GDK_BACKEND does not match available displays I installed xauth , xorg etc. But did not resolve my problem. I try ...
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30 views

how to set swap space of double the ram during installation?

I am having serious problems with my administrator password which I am still dealing with with not much help from here, anyway, after I am done with this I plan to reinstall 14.04 LTS (since the ...
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31 views

Ubuntu 16.04 lagging when opening browser

Whenever I open up my browser and watch video or open Facebook My CPU usage goes above 130% for Firefox It happens with every other browser Everything starts crashing and laggy I am using Ubuntu ...
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91 views

Pipelight flash plugin installation doesnt work with 16.04

I have recently installed 16.04 as a replacement for a 14.04. Reinstalling flash plugin with pipelight, I have followed the french ubuntu page for installing pipelight. Everything seems to work fine ...
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38 views

Session manager has amnesia

I've noticed that my browser slows with too many open tabs, which usually prompts me to reboot, but session manager is very spotty, sometimes remembers, other times not. Lately I keep getting this ...
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22 views

Problem when starting Firefox Developer Edition on Ubuntu 14.04 LTS

I've installed firefox-48.0a2.en-US.linux-x86_64 on Ubuntu 14.04 LTS. When I start the firefox binary I get the following WARNING 1463824852783 addons.repository WARN cacheEnabled: Couldn't ...
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44 views

I can't figureout how to download youtube videos with the help of uget and flashgot addon

I am on ubuntu 14.04 and have installed uget from the official ppa and also installed flashgot addon for firefox. In addition I have also downloaded the aria2 plugin and enabled it in the plugin ...
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11 views

Upgraded to 12.04 and can't log in to Firefox

I use a desktop computer. After upgrading Ubuntu to 12.04, I was/am no longer able to log into Firefox. I went to All Settings|User Accts. I am listed as the Administrator; under Login Options is the ...
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33 views

Program (firefox and others) windows all start maximized since 16.04 install Ubuntu Gnome

I just did a fresh install of Ubuntu Gnome 16.04 and ever since every time I start Firefox it starts maximized (covers the whole screen). This also happens whenever I open a new window from an already ...
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52 views

Laggy browser when opening Facebook or Youtube

Whenever I open YouTube or Facebook or any video streaming website, the browser keeps on crashing and the whole system becomes slow. Without opening Facebook or YouTube I don't get any lag, even ...
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35 views

Flash settings doesn't appear Firefox

Fresh install of Ubuntu 14.04 with all updates applied. Launch Firefox, and go the flash about page, and right click to click on flash area to go to Global settings (settings option is disabled). ...
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33 views

Adding Fonts to home/.fonts changes firefox fonts

I added about 35 free fonts that I downloaded off the internet into ~/.fonts (the folder didn't exist so i made it). This in Ubuntu Gnome 16.04. I added the files mainly for image editors but not just ...
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26 views

Session timed out on https connection on Ubuntu but not on Windows 7 or Android

When connecting in Firefox running on Ubuntu 16.04 to our corporate website which uses https with client certificate authentication, I get a timeout after 4-5 minutes and have to login again. Doing ...
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23 views

How to save toolbar customization on Firefox?

I always have to set my toolbar configuration whenever I login on a new machine.
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26 views

Bizarre Browser Behavior in Both Chromium and Firefox (Ubuntu 14.04 LTS)

Both Firefox 46.0 and Chromium 49.0.2623.108 run fine when first opened, but then start acting weird after a random amount of time. Firefox will not allow me to switch between different windows or ...
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48 views

Missing letters in Firefox on Ubuntu 16.04

How to resolve this missing letters in Firefox (See image attached). I am using Ubuntu 16.04 fresh install.
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30 views

Which web browser should be installed to use Teleboy

I have installed Ubuntu. Firefox blocks Shockwave which should be used with TV App Teleboy. Is there any other browser supporting Teleboy with the required Adobe support?
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96 views

The latest Firefox (46) loses scroll stability and functions 14.04.3

I have seen 'similar' questions but I already asked about this in Mozilla help and was told by a moderator that Firefox 46 requires GTK 3.04 or better. Um,.. hang on a mo, Ubuntu 14.04 runs Unity so ...
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23 views

FireFox, ssh tunnelling not working

I have Ubuntu 14.04 installed on a virtualbox vm. Set up ProxyCommand and it seems to work fine in order to connect my jumpbox before connecting to server1. So from localhost I connect to Jumpbox the ...
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68 views

Sound problem in Kubuntu Cubeutils + Youtube on Firefox

On Kubuntu 16.04 when listening Youtube randomly when I set audio volume to maximum it will (depends od Youtube video) automatically change volume on system audio on Audio settings (CubeUtils). ...
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186 views

Cannot watch streaming wmv on Ubuntu 16.04

Cannot watch streaming wmv on Ubuntu 16.04 64bit for example this link: digichannel.go2school.com.tw/lt/main.asp?page=dailyTV Neither Totem nor VLC will do the job. There are still many sites using ...
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17 views

Firefox deletes all my passwords and some addons

When I shutdown my ubuntu with firefox open after I booting back up all my passwords and addons disappear... looks like firefox restores it's state to factory... Except that cookies are still in place....
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136 views

Firefox browser is often crashing

I'm new to Linux distribution and now I'm using Ubuntu 16.4 in my laptop. In Ubuntu the Firefox browser is keep on crashing often. I don't know the reason and don't know how to fix this error. Need ...
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32 views

Firefox crashes ubuntu 15.10

I am very new. I just installed ubuntu 15.10 last week and I have several questions. This question is about firefox. The first time I started firefox that came with the in the package, the screen ...
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80 views

Ubuntu tablet touch keyboard not working with firefox

I have preinstalled Firefox in my brand new Ubuntu tablet, but I can not use it because touch keyboard does not comeavailable. Any idea why?
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43 views

Kubuntu: Firefox and Thunderbird display generic icon for launcher

My system was installed with a Kubuntu 14.10, upgraded to 15.04 and now it's a 15.10. Both firefox and thunderbird have launchers in my 'task manager'. For both applications, I get the same generic ...
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25 views

firefox audio doesn't work after using skype

After using skype (as videophone) audio from youtube films (and from all films viewed by firefox) doesn't work. Video is ok, sound is turned off. Films viewed by totem has the same problem. On the ...
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20 views

OS is not booting and running properly

I am using Ubuntu 14.04 LTS with Ubuntu-MATE desktop environment.Since the last kernel update I am getting error after GRUB Errors were found while checking the disk drive for /. Press F to attempt to ...
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21 views

How do I remove update packages from Ubuntu update center?

After removing firefox, the ubuntu update service(daily update check) keeps asking me to install/upgrade different packages for firefox even though firefox isn't there. How can I get it removed(for ...
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16 views

How to make the browser pop to the front when clicking on links from another app?

For example, when I click on a link on thunderbird, the link is opened in a new tab in chrome, which is great BUT, chrome stays in the background :( Same with FF when it was the default browser. ...
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1k views

distorted images, flash not loading properly, and chrome crashing on start

Yesterday I noticed several strange things happening. I noticed flash crash on BBC iplayer - I could not get it to start properly even after re-installing - it will load, but when you press play it ...
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21 views

Save battery by setting apps in inactive workspaces into a state like minimized

I'm interested if it's possible to make GUI applications on inactive workspaces (Unity) to behave like minimized GUI applications (is it the idle state?) in order to save battery life. What I mean ...
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35 views

Trouble outputing audio CHROME/FIREFOX

I am having trouble using the headphone jack on Ubuntu 15.10 in a iMac. I have sound output coming from the OS and from the test inside sound control panel, but not from browsers and some apps. I can ...
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19 views

Xubuntu opens a new firefox instance on extern link

I set up Firefox Developer Edition on Xubuntu and switched the Preferred Applications entry to /opt/firefox/firefox "%s" (the installation directory.) Now, whenever I click on a link outside of ...
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13 views

How to auto open web browser on network connect

Sometimes when I come across certain networks i.e. (school, work etc.) that need me to open my web browser to authenticate. Does anyone know how I can make it so when I connect to a specific SSID ...
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34 views

Only Google sites loading in Firefox browser

When I open my browser (Firefox) under Ubuntu 12.04, I can only open Google sites like Gmail and Google search page. But when I click on a link after I type a search word, the page will not load.
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44 views

Increase size of form input UI on HDPI screens in Firefox

I have a 4k screen on my laptop. Gnome does quite a good job of scaling things up and firefox generally seems to be using a 2px = 1px rule for its display which is fine. Except on the form controls: ...
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23 views

Firefox opens downloaded files with default app for Gnome instead of KDE which I am running

I am running Kubuntu 15.10 with KDE Plasma5. While I am running Firefox and open a file downloaded from there, it opens using the default application set in Gnome and not the ones configured for KDE....