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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2answers
48 views

Firefox always crash on startup after last updates

After the last update of Ubuntu sudo apt-get update Firefox won't start anymore. It always show crash error on startup and i tried to reinstall it and change profile and even purge installation. It ...
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0answers
4 views

Evince can open hyperlinks in Firefox, so why not in Chrome?

Before posting this question I investigated this and found it already implemented in my 14.04. Also investigated this which references the above linked question. Handlers for both ...
1
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1answer
1k views

How to get rid of the DNS Unlocker adware?

From this morning I'm witnessing unfamiliar ads apearing in different pages while using Firefox which they say "Ads by DNSUnlocker". I searched for it and it seems this is a known adware infecting ...
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0answers
11 views

Dual Boot: Windows 10 Screen Content appears in Ubuntu

How can this be??? I have a PC with one hard disk. I first installed Windows 10 Technical Preview (which was updated to the final Windows 10 around one month ago). After the Technical Preview of ...
6
votes
3answers
4k views

Pencil export page as PNG does not work

I was trying to use the latest Pencil (version 2.0.3) in Ubuntu 12.04, but the PNG exporting does not work, with Pencil working both inside and outside Firefox (which is 19.0.2). The export page as ...
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1answer
18 views

How to I re-activate “history” on firefox?T [duplicate]

The "history" dropdown has quit working, as have "File", "Edit", and the rest at the top of the firefox toolbar. How do I get these restarted?
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0answers
21 views

Java applets won't run even after instaling oracle jdk

I am new to ubuntu. I am using it since last month. I tried to install oracle-jdk (which includes jre) so that I can run java applets. I strictly followed the "Manual Install" process written on the ...
1
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1answer
32 views

Youtube videos of all the format doesnot play in Ubuntu 14.04 Firefox 40

Youtube videos of all the format doesn't play in Ubuntu 14.04 Firefox 40. Only 360p is playing. But all resolutions works fine in Chromium. But I want to use Firefox as default. Is it flash player ...
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2answers
4k views

how do I config a Foscam FI9821W IP camera on Firefox

I'm running Ubuntu 12.04 and Firefox. I've got a Foscam FI9821W IP camera and I'm trying to get live video on Firefox. Then I want to add to zoneminder. I opened the IPCam Client page and downloaded ...
4
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3answers
911 views

In youtube, There are just 360p and 720p options .(no 240p,480p and 1080p)

A couple of days before, everything is working perfectly good. But After last Ubuntu update -also flash player has updated- (I just think that was occurred after update but maybe not) I can not watch ...
1
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1answer
6k views

How to “get” system proxy settings?

I want to set proxy in my system firefox from firefox that I use by VPN. in VPN's firefox in Preferences/Advanced/Network/Settings the checkbox "use system proxy settings" is checked. where are ...
1
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1answer
23 views

Pipelight Silverlight not working in Firefox

I installed pipelight and try to enable silverlight with sudo pipelight-plugin --enable silverlight And receive the message "Plugin silverlight5.1 is now enabled". But when I go to this page ...
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0answers
25 views

Firefox stops responding when loading pages

G'day, When loading some web pages Firefox stops responding and dims for about a minute. Only thing I've changed recently is installed Oracle Java. Any known bugs I should be aware of? I've tried ...
2
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0answers
17 views

What information does the Firefox add-on Autocopy collect?

I have been using the Firefox add-on Autocopy for years without complaints on Kubuntu. I just noticed yesterday that since version 1.0.6.1-signed from late 2012 it features a tracking software from ...
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1answer
36 views

Unable to open Mozilla Firefox

pinank@pinank-NE56R:~$ firefox (process:14941): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed (firefox:14941): GLib-GObject-WARNING **: Attempt to add property ...
0
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1answer
10 views

Can I revert back to 14+ from 15 on an old machine?

So many problems with the new release, my reps and system is fighting them like a virus? Using Lubuntu 15.04 2g cpu with 1027 mem I know it is slow but still makes no sense why it takes so long to ...
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0answers
7 views

Opening a Firefox Protocol with a Program set in Wine

Currently, I'm having some trouble with associating a protocol (namely the nxm protocol) with a program which I have installed in wine (Mod Organizer). E.g. nxm://Skyrim/mods/3863/files/1000172397. ...
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4answers
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?
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1answer
6k views

Youtube only show videos in 360p quality in Firefox Developer Edition

I've been having this issue with Firefox Developer Edition (FDE) on Youtube, where it show videos only in 360p quality, there's also an "Auto" option, which is also, the 360p quality. I'm in Ubuntu ...
1
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1answer
87 views

KDE dark themes with specific windows overrides

Is there any ark KDE themes that have a functionality to do what Oxygen can do - "specific windows overrides"? Or is there at least dark Oxygen themes or some way to make default Oxygen darker? I ...
0
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1answer
80 views

Firefox does not play YouTube HTML5 videos

Firefox does not play YouTube HTML5 videos for me. There seems to be no way for me to make them start. They to not autostart and the lower left button (the triangle) does not start the video. The ...
0
votes
1answer
291 views

CRITICAL **: gst_app_src_set_size: assertion 'GST_IS_APP_SRC (appsrc)' failed

As reported here before, in some cases, at least, firefox won't play bandcamp tracks. I have tried to do it when running firefox from the command line, both with my default profile, and with a newly ...
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0answers
212 views

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 But when ...
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0answers
22 views

Firefox not redirecting instead showing about:blank

Recently I have found that Firefox is not redirecting. For example a http://t.co/OfIwUa4dxb link on Twitter will not redirect to http://www.ncbi.nlm.nih.gov/pubmed/26308551?dopt=Abstract but instead ...
0
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1answer
38 views

DRM issues 15.04

I am trying to watch NBC Sports on my Ubuntu machine. I currently have 15.04 installed. I have tried using both Chrome and Firefox. Chrome (updated) has flash 18, which is good. I've read though that ...
1
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1answer
66 views

How to change the Firefox icon?

I have Ubuntu 14.04 64bit. I am currently using Firefox which is present on the Unity panel (or launcher). The problem is that the icon is a question mark. I want to change it to the standard Firefox ...
2
votes
1answer
36 views

Firefox doesn't play audio

To be clear, the audio on my laptop is working just fine. Other applications in Ubuntu play sounds as expected. Firefox, however, won't output any audio through the native speakers or headphones. ...
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2answers
46 views

Mozilla Firefox doesn't scroll smoothly on Ubuntu

I have problem with Firefox on Ubuntu. When I scroll on facebook or youtube it doesn't scroll smoothly like it used to on Windows. It's hard to explain but main point is when I scroll down/up it ...
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0answers
74 views

Any Webbrowser crashes in 14.04 since last update

I've been experiencing some annoying crashes of any web browser I use since I last updated Ubuntu & Firefox (However the problems extend to Opera & Chrome as well). First I'm just a user who ...
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votes
0answers
21 views

How to move firefox to Applications [duplicate]

I tried to go to usr/share/applications where i found out that all my applications were present in it except Mozilla firefox. I strongly need firefox to be present in Applications. Please suggest ...
1
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0answers
30 views

Firefox does not open dolphin for inode/directory in kubuntu 15.04

this question has been asked multiple times like 1 and 2, but their solutions won't work anymore. Probably because of Plasma 5 and the new firefox versions. So I am using Kubuntu 15.04, Firefox 40.0 ...
0
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0answers
18 views

Chromium problem

Well, this is new.. I think I hosed my system and don't know even where to start poking around.. I did apt-get update, apt-get upgrade and noticed that chromium had been removed from my system. So ...
12
votes
3answers
5k views

How can I get Firefox to recognize multitouch gestures on a touch screen?

Multitouch seems to be working fine on Chromium out of the box, but not on Firefox. On Chromium, dragging a finger up or down the screen scrolls the screen as expected, but on Firefox, that gesture ...
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2answers
247 views

Run FireFox as root as always without password

How i can run firefox as root from launcher in ubuntu 14.04 always without password ?
2
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1answer
3k views

Ubuntu 14.04 System Freezes - Firefox eats a lot of memory with nvidia-prime enabled

I have a clean install of Ubuntu 14.04 on a Dell XPS L502X Laptop with a discrete, optimus-enabled Nidia card. System was working great until I decided to install bumblebee to enable the Nvidia card ...
0
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2answers
575 views

Firefox 40 really slow

I had a problem with Firefox 39.03 unable to start. This problem was been fixed with Firefox 40, however; now Firefox is really slow. Tried most of the published fixes, new profile, uninstall - ...
10
votes
5answers
18k views

How can I get Firefox to open torrent files with Transmission?

Every time I download a torrent file (.torrent), Firefox thinks I should open it with a text editor. How can I get it to open with Transmission? In Edit -> Preferences -> Applications, there's no ...
2
votes
5answers
265 views

Scroll *one* line at a time in a web browser

If you read long texts with a web browser, it is easier for the eye to have something that guides them. One simple solution is to read at the bottom of the screen and scroll down one line after the ...
0
votes
1answer
789 views

Why won't videos on some websites play?

I recently installed ubuntu on my laptop and was able to install the flash plugin. I am able to play youtube videos on firefox with no problem. However videos on some websites don't appear, only ...
3
votes
4answers
4k views

Youtube doesn't work anymore in firefox (Ubuntu 14.04)

Title says it all. Whenever I try to play a Youtube video I get the error messages: Your browser does not recognize any of the video formats available It worked fine just before I installed the ...
0
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2answers
39 views

Firefox doesn't follow the system locale

I set up the default system language to Polish and the regional settings to Poland. All applications but Firefox follow this setting. Firefox stays in English Is it possible to make Firefox follow ...
3
votes
2answers
56 views

Automatic updater on Ubuntu 14.04

I am using Ubuntu 14.04 and I have enabled automatic updates but every time my Firefox and Chrome are updated they are downloaded from scratch, so every time my update size is more or near 100MBs. ...
1
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0answers
32 views

Firefox screen content frozen, but I can switch tabs

Multiple times a day, I notice that the content of Firefox is frozen on some webpage. But the app is not frozen! I can right click to open the menu, I can switch tabs (cannot see the content, but see ...
1
vote
0answers
289 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 ...
0
votes
1answer
24 views

Java Plug-in Crashed in Firefox 28.0 on Ubuntu 14.04 LTS

I just installed Oracle Java 1.8.0_51 .And set as it as by default.I also linked libnpjp2.so file in Mozilla folder in /usr/lib/mozilla/plug-in. But when I am going to verify java its show no java ...
0
votes
0answers
18 views

Chrome copies Firefox browsing history

I have only an SSD on my computer, so I decided to keep it as clear as it is possible. It's my first time with Ubuntu, I have only used it several months on a virtual machine, exclusively for working ...
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votes
1answer
112 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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0answers
36 views

Could firefox be causing system crash?

Originally the title for this question was: Could my USB3 SSD be causing my system to crash? But then I realized that all three times that linux has crashed this week, I was working in Firefox. I'm ...
4
votes
4answers
2k views

How to uninstall apps installed through Firefox Marketplace?

In Firefox 35, there is menu called "Apps" that allows to install "firefox apps" through Firefox Marketplace. I installed an app but now I can't find how to remove it! Is there an obvious way that I ...
1
vote
1answer
17 views

How to copy text from interactive online editor?

I cannot copy source code from interactive online editor like FStar When I paste code everything works as it should, but trying to highlight and copy/cut from it ends with one character "".