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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ubuntu 14.04 firefox starting without sudo gives security library failure on SSL sites

i have a problem with ubuntu desktop 14.04. when executing firefox without sudo, then all the https sites (even http://google.com) gives me "Error code: sec_error_library_failure" message. when ...
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1answer
6 views

Firefox reinstalled, but not xul-ext-webaccounts

I wanted to reinstall Firefox, so what I did was: sudo apt-get purge firefox And this was the output: Reading package lists... Done Building dependency tree Reading state information... ...
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7 views

Add exception for wrong certificate for subdomain “ssl_error_bad_cert_domain”

One of my domains I use has an HTTPS certificate that is only valid for example.com. Whenever I try to access one of the subdomains I get an error: The website uses HTTP Strict Transport Security ...
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68 views

Firefox won't run java after installing 15.04

I installed ubuntu 15.04 yesterday. Firefox will not run the race viewers at igpmanager.com which use java. Ran java version and it returned the latest version of java. This machine is running an SSD ...
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12 views

firefox -37.0.2 not taking proxy username and password

I am behind the proxy server, when i open Firefox-37.0.2 a window came and say "authentication required" after entering the proxy username and password, keep asking continuously "authentication ...
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17 views

Various programmes crashing frquently - could be an issue with the system?

About a week ago Firefox started crashing very frequently, 20 to 30 times a day. On random pages, doing random things, sometimes even when it is minimised. I ran the updates and checked the system for ...
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14 views

Is it possible to download the latest version of Adobe flash player? [duplicate]

I was trying to play a game on Facebook that I haven't been able to play since switching to Ubuntu. It requires the latest version of Adobe. I couldn't download Adobe so I downloaded a flash player ...
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18 views

How can I start a simple X with just firefox? [duplicate]

I'm trying to start a simple X server with just one app open, which is Firefox. Basically, I want to power on my Ubuntu server and show Firefox, nothing else. Is there a way to make this possible? ...
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30 views

If flash isn't installed in the first place, why does Firefox need Flash block 1.5.18 to block auto-play video advertisements?

My netbook becomes extremely inefficient when being bullied by auto-play video advertisements on the internet. I am on Lubuntu 14.04 using firefox 37.0.1 (Mozilla Firefox for Ubuntu | canonical 1.0), ...
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1answer
48 views

java plugin is not working

I want to run following website in chrome/firefox in my ubuntu : http://bikecad.ca/quickapplet which shows following message: However i have already followed these steps but its not working. Help ...
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17 views

Lubuntu Firefox is always running

I have a very persistent Firefox. Even after a reboot the process is running, and starts by itself again if I kill it. Yesterday, I heard the audio of the last youtube video after a reboot. I tried ...
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1answer
51 views

My Firefox 37 has problems with Yahoo mail in 14.04

Since update to Firefox 37.0.1, I have problems with Yahoo mail (webmail). Sometimes, inline pictures are not shown, they only end up as placeholders, also not shown as attachments. In such cases, ...
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31 views

Pipelight stopped functioning after HBO new web update in mid April, 2015

I have got HBO Nordic working with Pipelight on Ubuntu 14.10 for long time. Suddenly a web portal update around the 12-13 of April made it stop working. I can log into the HBO Nordic with my ...
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58 views

Memory black-hole: Are there known issues regarding multitasking in Ubuntu 14.04?

Are there known issues regarding multitasking in Ubuntu 14.04? I've recently upgraded to Trusty from Precise for I needed some updated applications. Installed 14.04.2, the desktop and animations were ...
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32 views

Internet Connected but cannot visit websites

My laptop is Elitebook 745 G2 running Ubuntu 14.04, new installed. It has dual OS: Ubuntu and Windows. The internet service works well in Windows, but cannot work in Ubuntu, though it is connected and ...
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14 views

Firefox: make ctrl+enter submit a form, even if cursor is in a textarea

How can I make Firefox submit a form by hitting ctrl+enter even if cursor is in a textarea? There are some work arounds to enable this, if you create web pages with jquery. But this short cut should ...
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1answer
32 views

browser hijacker won't go away after deleting Vista

I recently downloaded Ubuntu and deleted the old OS, windows vista, however, a browser extension called Frontier search has hijacked Firefox and I can't seem to remove it. Please help, all guides to ...
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12 views

upstart .conf script not running at startup

I have a .conf file I run at start up. This file runs a script file i have stored elsewhere. But it does not run. Its supposed to launch node.js and two tabs on firefox. When i launch firefox after ...
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4answers
85 views

Where/when is the update for Firefox to version 37..?

I checked with Synaptic Package Manager and the latest is 36.0.1+..... 37 was released in March.
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1answer
24 views

Pencil 2.0.9 opens a new firefox window instead of the software itself

Pencil Project is being actively developed here. I have firefox installed and I copied the linux package files to their respective folders. When I click application entry in menu it open firefox but ...
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15 views

Firefox Flashplayer suddendly zoomed in

Sometimes when I'm watching Videos on Youtube it just zooms in. I can only see the upper left corner of the video. I'm pretty sure it is a flashplayer problem, since the bar at the bottom (with play, ...
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315 views

Since update of Firefox v37 internet access is slow

Before the auto update to Firefox v37 occurred Firefox worked fine on my Ubuntu 14.04 system (ethernet connected to 20Gbps internet up 4Gbps down). My system is 8 core, 32GB ram, ubuntu 14.04 ...
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19 views

why is firefox hello always on top?

I use firefox hello often and that little panel with the camera, the microphone and the firefox icon is always on top and i cant turn it off or just simply hide it. Are there any possibilities to ...
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20 views

Any workaround for broken Firefox 37 view-source?

I've been somewhat disappointed with the new Firefox 37 release on Ubuntu. The worst problem I've had so far was the view-source bug, where it shows what the page used to be. Am I the only one having ...
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1answer
48 views

Can an unmounted USB be infected my malware?

Yesterday, I went on a dark creepy site whose js freezed my system/firefox (Ubuntu 14.04 up to date, Firefox 37.0.1 up to date). Now I tried, from the same system, to find any malware with: sudo ...
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1answer
55 views

Advertisements shown when page is viewed in Chromium but not when viewed in Firefox

The title says it all, i keep on seeing advertisements when i open pages in Chromium, those ads are shown in portions of the page (not popups) usually at the bottom and/or the top of the page and do ...
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26 views

Firefox and Chromium won't display pages correctly

I have recently installed Ubuntu 14.04 LTS so I’m quite new with this OS, so please be patient with me. My Firefox and Chromium was updated when Ubuntu asked to update in software updater, but now I ...
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3answers
120 views

Video quality on Youtube (Firefox) is limited to 360p

I'm finding that the video quality setting on Youtube videos only has the options "Auto" and "360p". My browser is Firefox 37.0.1 and I'm using Ubuntu 14.04 LTS 64 bit, and my motherboard chip-set is ...
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2answers
50 views

control audio kde plasma after hdmi removal

I am using kde:plasma version 4.13.3 in ubuntu 14.04 and it works great in most ways, but on my laptop I frequently use it as my "media center" pc. I hook it up to the TV through the HDMI port. When ...
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1answer
42 views

where is the firefox menu in ubuntu mate?

I recently installed ubuntu MATE 14.04.LTS as OS. most programs bring a menu "below"/underneath the window-"bar" (I am sorry about the unspecific vocabulary, i'm noob) - you know, the place where you ...
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45 views

Ubuntu 14.04 cannot access same website from one of two computers

My problem is weird. I can access the nhl.com site (and flames.nhl.com) from one box running 14.04, but not the other running the same. This is with Chrome and Firefox on the same wired network. ...
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25 views

Firefox locks up on Ubuntu 14.04 when using the address bar

I have a problem with firefox. Every time I type something into the address bar (and it seems only there), firefox freezes and i can not do anything. This happens on a freshly installed Ubuntu 14.04 ...
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0answers
25 views

How do I recover my firefox tabs?

I reinstalled my Ubuntu, I saved my profile that resides in ~/.mozilla/firefox/PROFILE. I assumed it would restore my tabs after I copied the profile back. History and such is available, but no tabs ...
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64 views

Firefox Animations Extremely Slow

I'm building a website with the occasional animation in it, by jQuery and by using CSS3 transitions. I'm wondering why they look so slow compared to the Mac/PC version of Firefox (Which runs ...
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1answer
103 views

WebEx error: Java is not working

I am trying to join a WebEx meeting. However, when I try to do that, it gives me an error: Java is not working. To have the best experience joining meetings, Java must be installed on your ...
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0answers
18 views

How to install firefox addon Skip Cert Error silently through automation

I want to install firefox addon Skip Cert Error to skip ssl error for my automation projects running on Linux virtual hosts. However, I want this installation of add-on to be unattended through some ...
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0answers
10 views

Firefox extension compatible with Unity to show download status in launcher

Are there any working Firefox extension compatible with Unity to show download status? Unityfox was the one I have been using for a long time but it is not compatible with latest versions of Firefox. ...
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34 views

Dark xfce themes makes elements black in firefox - userContent.css is not enough

I'm using dark theme for XFCE and along with the DE the default css of firefox has changed. I tried to fix it by creating file ~/.mozilla/firefox/chrome/userContent.css and pasting in some css - it ...
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3answers
633 views

Ubuntu Start Page in Firefox Language changed suddenly

Suddenly on the Ubuntu Start Page in Firefox English has been changed to Spanish. How do I reset to English?
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1answer
41 views

Firefox shows all background color as white starting today on all pages

When I started Firefox today all background colors were gone as in the following screenshot: This probably happened because I have set up automatic software updates, so something must have gotten ...
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1answer
172 views

How to install Microsoft Silverlight on Mozilla Firefox browser in an easiest and reliable way that runs on ubuntu 12.04 LTS 64-bit operating system?

I am using ubuntu 12.04 LTS 64-bit OS on my system. I am using Mozilla Firefox 37.0(**Mozilla Firefox for Ubuntu canonical - 1.0)** and Google Chrome(Version 41.0.2272.118 (64-bit)) browsers on my ...
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11 views

Bleachbit -> add firefox

I installed bleachbit on my computer, it did not have Firefox automatically ub the sidebar to delete data within it .. but it did have internet explorer and google chrome. How do I change it to have ...
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3answers
303 views

FF 37 Ntlm not working

I am using 14.10 I just upgraded my FF from 33 to 37. I have a timecard system at work that uses NTLMv1 I have set network.negotiate-auth.allow-insecure-ntlm-v1 to true I get the Authentication ...
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1answer
53 views

Firefox first tab weird language

When launching Firefox through Terminal with: firefox I get this output: (process:10923): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed 1427987784903 addons.manager ...
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0answers
19 views

Firefox: don't rename files with “filename(1)”

If I download two files with the same name (or even the same file twice by mistake), Firefox appends "(1)" to the filename (or "(2)", etc). I find parentheses in filenames annoying, especially ...
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1answer
79 views

Citrix Receiver on Ubuntu 14.04.2 fails with error Entrust Certification Authority - L1K SSL Error 61

Currently I am using ubuntu 14.02.2 64 bit version. My citrix receiver was working fine for a few months. After a few updates ubuntu fails to open the application with the following error: Entrust ...
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1answer
14 views

need help regarding blank javascript pages

I’m using Ubuntu Firefox on Linux. I play a web game and I use about 100 tabs to play it. When I go through the tabs with Ctrl+Tab it will open a window with JavaScript in the address bar and the ...
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2answers
61 views

where is Adobe Flash Prefrences?

I use Mate, on both debian and Ubuntu, periodically I like to use a video chat website that uses flash. I find that if the site doesn't have permissions to flash camera and mic setting prior to ...
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25 views

Ubuntu 14.04 KDE reversed green and red on images

I haven't used KDE last few weeks and so I have done some regular firefox and ubuntu updates during this time. But today, I logged in with plasma desktop on my Ubuntu machine and surprisingly realised ...
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8 views

Firefox keeps reverting the 'do not track' setting

Lately I discovered that (now) Firefox 36.0.4., but also several version before this one do not respect the 'do not track' setting. I want the setting to be off, because I think it doesn't make much ...