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 re-install and activate fonts

I am using Ubunut 16.04 LTS. I have noticed that after each update of the system, firefox and chromium browsers not recognizing previously installed fonts ( windows and Mac fonts ). Is there any way ...
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39 views

Firefox can't display math in wikipedia.org

When I try to open a wikipedia page with equations I see just blank space in their place: Although I can see png and image files in other wiki pages. I checked permissions in Tool > Page Info and ...
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54 views

Firefox Linux problem

Firefox – Linux – Kubuntu Problem All mouse over text boxes are black. This occurs on all menu bar, bookmark tool bar, status bar and history icons and bookmarks. This started a few weeks ago. No ...
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57 views

16.04 image tearing and lagging

On ubuntu 16.04 when I watch movies in Kodi if I press the volume up/down hotkey I see little stutter in movie (cca les than a sec). And also if vlc is open and ff in background with YT I see image ...
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16 views

How Do I Make Thumbnails Larger When Selecting Files For a File Input Type?

When selecting a file from the dialogue box that pops up for the "file" input type in Firefox, images are too small to be able to tell from the thumbnail what they are as shown below: Is there a ...
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362 views

Flash Player Videos Not Loading in Ubuntu 16.04

Flash player does not seem to work properly on some sites in Ubuntu 16.04. Try this sample link: http://www.hotstar.com/the-secret-life-of-pets-trailer/1000071647 In firefox, it shows "movie not ...
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15 views

Change the color of the browser preview with ctrl + tab

When I do Ctrl+tab in Firefox the browser preview window does come up but the selected tab is not highlighted such that it be clearly visible and is very difficult to spot. I am using Ubuntu 16. All ...
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40 views

Remove Oracle JRE 8 browser plugin installed

I'm on 14.04 and have the ppa Java 8 installer running on the box. It's okay to have it to install Java 8 in general, but in detail it has the flaw (at least in the way I use it) that it installs a ...
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233 views

bq M10: keyboard problems with Firefox

On the bq Aquaris M10, with Ubuntu Touch OTA10.1, I frequently encounter problems with Firefox. In particular, keyboard input from a Bluetooth keyboard randomly doesn't work anymore until I close and ...
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50 views

Firefox 45.0.1 doesn't play videos when run as a different user on ubuntu 15.10

If something similar has already been posted somewhere: sorry about that; I am noobish... I have a newly installed Ubuntu 15.10 and I'm trying to run firefox as a different user (lets call this user ...
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229 views

How do I get firefox do use the numix theme again?

I normally use Ubuntu 15.10 with the numix theme, the typical black style with red menus along with circle icons. I recently tried kde plasma(because for whatever reason it was installed on my system),...
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21 views

Firefox reset automatically in startup 15.10

My Firefox reset after shutdown. Firefox profile is copied to a backup one and Firefox starting a new one. -rw-rw-r-- 1 teddy teddy 104 Mar 19 13:12 profiles.ini lrwxrwxrwx 1 teddy teddy 39 Mar 19 ...
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31 views

Windows are graying out fairly often in Ubuntu 15.10, help?

No, this isn't for any specific program (as the suggested other questions are), this is in general. I will be attempting a task and the window will just gray out and become unresponsive for a while. ...
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17 views

Fresh Ubuntu user, watching video with firefox crushes my system

this incident happent several times today, i am trying to watch some videos from udemy with my ubuntu firefox. It randomly stucks and whole system stops. Only thing to do is restarting pc by pressing ...
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26 views

Firefox does not show all general options

I can see in the picture here https://support.mozilla.org/en-US/kb/startup-home-page-tabs-download-settings that in the bottom of the first general preferences are 6 options, however I only have 3 ...
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32 views

When downloading files Firefox opens a terminal

When I try to download any file using my Firefox browser, it opens a terminal and downloads from there. I don't wanna do that. Is there any way to get rid of downloading files over terminal? I'm ...
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101 views

Facebook crashes Firefox

Facebook loads, will let me scroll down until eventually connection is lost, Firefox crashes and requires System Monitor to Kill Process. I don't know what extra info you may need. I'll add details ...
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40 views

Unclear graphics in Ubuntu 15.10

When I try to use Firefox or Google Chrome browser or PDF reader, I cannot read the text properly. The characters are unclear (see screenshots). I have already installed the Intel G31 graphics driver ...
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71 views

Apt-get cannot find version firefox=41.0+build3-0ubuntu0.14.04.1

In another box I have firefox 41.0+build3-0ubuntu0.14.04.1 installed: apt-cache policy firefox firefox: Installed: 41.0+build3-0ubuntu0.14.04.1 I'm trying to mirror the environment so I tiried ...
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93 views

Firefox does not display website properly on ubuntu 14.04.3 LTS

Please help me the following problems: I'm using Ubuntu 14.04.3 LTS and Firefox 43.0. Today, when I open firefox and it doesn't display website properly as in screenshots. I reinstalled it but the ...
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69 views

Ubuntu 14.04 freezes when during or after opening firefox

Ubuntu 14.04 freezes during or after opening Mozilla Firefox. I have installed Ubuntu on two computers, one is a dual boot with Windows 7 and the other I just did a strait install. The same problem ...
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52 views

wireless usb adaptor problems (system hangs)

I am trying to use an asus usb-ac51 wireless adaptor to get internet on my desktop pc running Ubuntu 15.10. I installed the driver for linux that was provided with the accompanying CD for the usb ...
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103 views

Google Chrome using on Ubuntu 15.10 cause random black screen with logout

At work I daily use an HP Compaq Elite 8300 (Intel i7), with Ubuntu Desktop, Eclipse and Netbeans for develop linux embedded software, Java EE application and HTML/Javascript solution, and as browser ...
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195 views

Can't play quicktime stream video on Ubuntu 15.10

I've installed Ubuntu 15.10 instead of Ubuntu 14.04. After that I can't play quicktime stream video from my video surveillance in Firefox (and in chromium and google-chrome too). I tried to install ...
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47 views

Firefox and Thunderbird will not launch - no known changes leading up to this event

After months of troublefree operation I started my computer to find that I cannot launch either Firefox or Thunderbird. dad@dad-Extensa-5235:~$ firefox Could not stat private per-user gnome ...
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201 views

Thunderbird 38.3.0 on Ubuntu 15.04 - Cannot connect to gmail server

Linux LCP22 laptop, 64bit Ubuntu 15.04. Thunderbird 38.3 & Firefox 42.0 I am new to Ubuntu & command terminal use. My problem seemed to start around 20 Oct. Initially is seemed the problem ...
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51 views

Java Security overriding whitelist

I'm running 15.04 on a custom build and Java Security is giving me fits. I need to run apps from a specific site that keep throwing a security error. No problem, I go into the control panel and ...
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53 views

FIrefox - Cannot access multiple websites

(Ubuntu 14.04) - Firefox Issue. Hi, Recently installed Ubuntu as my main OS and I'm having trouble accessing two websites, I may be missing something small and the obvious here so include ...
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89 views

Ubuntu 14.04 LTS fresh install multiple errors

Every few minutes I get an error about an internal error. /usr/share/apport/apport-gtk apport-gtk 2.14.1-0ubuntu3.11 the software center crashes after being open about a minute Firefox crashes almost ...
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71 views

Ubuntu Company Certificate Help

I'm new to Ubuntu and have a question. My company uses a custom certificate which is put into the certificate chain. Having this, Firefox always asks me to add an exception and also on the terminal I ...
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22 views

websites doesnt load & restricted from accessing?

my company as installed ubuntu 14.04 14.04 LTS ON NEW COMPUTER DEVICE NAME: CTEL-DESKTOP MEMORY 1.9 GIB PROCESSOR INTEL CELERON(R) CPUJ1900@1.99GHz *4 GRAPHICS INTEL BAY TRAIL X86/MMX/SSE2 OS TYPE 32-...
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97 views

Chrome or Chromium retry corrupted/incomplete download file functionality

Is there any functionality available in Chrome or Chromium browser mentioned below: Retry corrupted/incomplete download (from the time it is left) Sometimes because of network failure/...
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63 views

NoScript syncing?

I have just noticed that after firing up my browser (after a NoScript update) I am getting strange reports of syncing in association with NoScript: When selecting Copy from the right-click menu on ...
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217 views

Installed google hangouts plugin, cam not detected

I'm a n00b, so please ELI5 answers. I was using firefox hello and my cam was working fine, then it muted my video on its own. I closed it and tried to use google hangouts. Had to install the plugin. ...
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97 views

How do I make Firefox open in the foreground when clicking a link in Thunderbird?

I click a link in Thunderbird (31.8.0) and Firefox (40) opens, but it's always in the background, even though keyboard focus is transferred from Thunderbird to Firefox. I have been pressing Alt + Tab ...
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690 views

cannot watch hulu on firefox after fresh install on 14.04

I just installed ubuntu and decided to watch hulu, I just got a white box. No flash options (or anything) appear when I right click. Other flash apps work fine, though when I right click to change ...
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33 views

Any brower gets connection reset on a specific site, while wget works

I cannot browser the http://nytimes.com website from any browser installed on my Linux Ubuntu (Chrome and Firefox), but I can download the landing page using wget http://nytimes.com Already tried to ...
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1k views

Ubuntu 14.04 LTS YouTube videos are choppy

I just installed Ubuntu 14.04 LTS on an older computer I had for an HTPC. All I really wanted to do was use it to watch YouTube, Twitch, and browse the internet. Unfortunately, it fails at watching ...
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376 views

Google Maps using WebGL in Firefox crashes Ubuntu

My system configuration (Hp pavilion 15 - p238nd): processor: Intel i5-5200U graphics: Intel HD Graphics 5500 Video card: NVIDIA GeForce GT 840M Window manager: XMonad Description of problem: ...
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248 views

Can i make 64 - bit Firefox use 32 - bit Java and how?

I am a newbie when it comes to Ubuntu, so please endure my ignorance... I have installed Ubuntu 15.04 for safety reasons and to have a desktop with no distractions for study. The Study I am attending ...
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2k views

WebEx on Ubuntu 15.04

I can't get webex to work. When I click start "Enter Room" it gives me the helpful error of: "Your browser, browser version, or operating system is currently unsupported." I've tried the ...
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328 views

Applications freeze and does not respond to mouse click or keyboard commands

So yesterday I installed Ubuntu 15.04 on my laptop , it has 1.8 GiB RAM and 1.60GHz processor . After a while when I was browsing on Firefox while it just stopped responding to the mouse clicks and I ...
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343 views

I used apt-get to install firefox in ubuntu touch and can't run it

I've tried firefox and /usr/bin/firefox and I get the same error message. (process:5119):GLib-CRITICAL **:g_slice_set_config: assertion 'sys_page_size == 0' failed error: no display specified so I ...
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34 views

How can I tell Firefox to visual highlight focus cursor to make it more visually noticeable?

How might I highlight the current focus cursor in Firefox? That is, how do I make the cursor that moves focus when pressing the tab key more visual? Given my current desk situation, my keyboard is ...
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101 views

HP printer is printing only English part not Hindi one

I don't know why my printer is only printing English part of paper, It leaves blank Hindi part. Anyone have faced this problem? And When I opened the document in Firefox, it was not displaying Hindi ...
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32 views

Setting the integer value of browser.backspace to 2 within Firefox's about:config does not enable backspace

I am not sure as to why this doesn't work. I am currently using a Linux Ubuntu 15.04.2 LTS. Also, is about:config called advanced preferences? Edit: If anyone is looking for an alternative, ALT + [...
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64 views

Backing up firefox from old ubuntu version and importing it to new ubuntu installation

I am trying to install ubuntu 14.04 version. I have a previous version of 10.04. I want to keep all my book marks and history firefox in the new installation. I have read posts here saying to copy ~/....
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2k views

What's the state of hardware accelerated HTML5 video on Ubuntu?

Flash hardware acceleration never really worked in Linux due to various APIs (VDPAU, VA API, and what not), buggy drivers, and end-of support from Adobe for Flash on Linux. Recently several sites, ...
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184 views

Firefox eventually for no aparent reason consumes all CPU and RAM and grinds to a halt pulling my computer along with it

I now use Firefox as my default browser and have found that after having it up and running for several hours, that it starts to use up more and more of my CPU and RAM, and this does not appear to have ...
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72 views

How to populate zeitgeist with firefox favorites and visited pages

Pretty straightforward question here. How to populate zeitgeist with the pages visited & favs from Firefox? I remember that there was a package/extension that provided that in the past, but I ...