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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82 views

Firefox: ogv and webm video format dont fire

I have problem with ogv and webm video format in my firefox - dont work. Do you have any suggestion why ? In chrome all works nice and smoth. On windows all works fine.
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107 views

How to force Firefox to prefer WebM over MP4 when both are available in a <video> tag?

There is some problem with MP4 playback on my installation and WebM files are played perfectly. But if the first source in a <video> tag on a page is mp4 it's getting selected automatically. ...
2
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1answer
27 views

Certificates on Web with Firefox

How do I update certificates when one has expired? In Firefox on both 14.4 AND Windows 8.1 I am getting a lot of certificate errors- either expired or do not recognize the name on certificate. By ...
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0answers
34 views

QR code not loading in any of the browsers!

There are some sites which are not loading properly in any of the browser like FireFox, Chrome and Opera, specifically those sites which loads QR code like Portal, Whatsapp and some other sites like ...
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1answer
110 views

Firefox and Thunderbird not starting due to permission issues

After using Firefox and Thunderbird without problems for almost half a year on Ubuntu 15.04, they suddenly did not start any more, neither from starter, nor from terminal. Trying to start from ...
4
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1answer
70 views

How to keep the Firefox Health Report on, but stop the data sharing

I am running the latest version of Firefox (currently Firefox 40) which has the option to generate the Firefox Health Report: However, unlike on Windows and the Mac, there is currently no obvious ...
4
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2answers
353 views

Firefox freezing on youtube

The title says it all. Once I try accessing youtube, firefox freezes and I have to force kill it with killall firefox or xkill firefox . The issue is youtube specific; other video websites , such as ...
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1answer
113 views

Change or reset default download application in Firefox

Every time I download a file in Firefox with an unknown extension, Firefox offers to open it with Password Gorilla (default). Firefox does show the proper application for known file types, e.g. pdf. ...
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5answers
3k views

How to install Adblock Plus on Firefox in Ubuntu 14.04

I use Firefox as my primary browser and I would like to do away with all those pesky ads that different sites keep throwing up and waste my time. I recently refreshed my browser and I lost my ...
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1answer
36 views

PNG images are viewed by Firefox

General problem start with seting default application for viewing png files as a Shotwell. If your default image viewer is Shotwell Viewer, your PNG files will be opened with Mozilla Firefox. Why is ...
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1answer
341 views

Install/Enable Adobe Flash Player debug version in Ubuntu 14.04 for Firefox (if possible for Chrome too)

I found many different solutions similar to each other on the web, but obviously they are outdated. It's suggested to download the flash player from here https://get.adobe.com/flashplayer (Nothing ...
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0answers
52 views

Virus? Firefox is Erasing Everything I Type!

In Ubuntu 14.04.3 (64 bit), I'm experiencing a very strange behavior in Firefox, where it is erasing everything I type into textarea and text-input fields. Right now I'm having to use Chromium to ...
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1answer
81 views

Remove “Link to” from .desktop file display name

From firefox, if I highlight the address and drag it to the desktop a .desktop file is created that links to that page. The name has the form "Link to ...". Is there a setting to get rid of the "Link ...
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0answers
60 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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0answers
27 views

It started with major trouble with Firefox

So I wanted to configure my firefox and install my plugins, but it crashed on me and started using more and more resources until it froze my entire pc and I had to restart. And it would do each time I ...
0
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1answer
190 views

Error when trying to install ubuntu-restricted-extras

I'm trying to run webgl apps in my web browser but whenever I try to, nothing happens so I did some googling and found that ubuntu-restricted-extras can be installed to enable webgl. One of my friends ...
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1answer
33 views

firefox: some tool boxes with black background (unreadable)

In my ubuntu 14.04 machine, and only for one of the user accounts in that machine, firefox has begun to show all those right-click context menus, pop-up lists of suggestions, and the list of recent ...
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1answer
245 views

How do I fix bad font rendering in web broswers?

This just happened today - the fonts in my web browers' UI as well as content looks awful. I'm running an up to date version of Ubuntu 15.04. The browsers affected are chromium and Firefox. Strangely, ...
3
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1answer
285 views

How can I get rid of Shopping Assistant AdWare on my firefox?

I have Ubuntu 14.04 LTS and Firefox 39.0 installed on it. Recently my Firefox is infected with an Ad-Ware with "Shopping Assistant" title on it from aliexpress.com website. When I open a shopping ...
2
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1answer
50 views

why does google talk work with firefox but not with chrome

I have switched to Chrome because Firefox gets stopped with scripts not working (I don't know how to fix that issue). Chrome is OK except that google talk doesn't work. I would have to use hangout ...
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1answer
150 views

Firefox is using too much memory and is freezing my machine

I have some 40 machines in our company. They are running Ubuntu 14.04 with 4Gigs of RAM. Very recently I noticed that almost on all machines Firefox browser is using around 1.2 to 1.5 GB of RAM and ...
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0answers
28 views

Locking down Blocksi in Firefox

I'm wanting to know how one locks down the Blocksi web filter in Firefox. Namely, what I need to know is 1) how do I enforce that ALL web traffic goes through Blocksi, and 2) where, in the Ubuntu ...
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0answers
47 views

Image tearing (FF+VLC)

I noticed a strange problem. If I run FF with youtube and playing a video in background (360p,720) and play a video(dvdrip, 1080p x264 mkv,1080p x264 mp4) in Vlc I notice image tearing, or something ...
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2answers
85 views

No Pocket icon in Firefox although it's installed and active (“true”)

I've installed Ubuntu 14: on Firefox i can't see the Pocket icon - although it's installed and activated ("true" in about:config). I've logged on by web, but it's not the same. Anyone has the same ...
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0answers
57 views

Pop-up tabs in firefox in random websites

Lately when I am using firefox I experience these pop-ups in new tabs in any website I join when I click anywhere on the page or on the scrolling bar. This happens even on the website of google. I ...
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0answers
94 views

Problem loading webpages in chrome and firefox ubuntu 14.04 lts

Some websites does not load, the circle keeps rotating backwards and after a long time "no reply from server" message is displayed. All google websites except gmail work well. It loads in windows 10 ...
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1answer
48 views

Wireless disconnects and reconnects especially when I download from deluge and firefox

In general, my wireless connection seems to be working fine but it keeps disconnecting and reconnecting when I start downloading files from deluge and Firefox. I have tried most of the tweaks and ...
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0answers
63 views

Kubuntu -> Chrome and Firefox Tab and bookmarks fonts are really tiny

How do you make them bigger? Things I did today. I had a monitor go black today, loaded nvidia management to correct this problem, also adjusted monitors via window management. Not sure if those ...
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0answers
43 views

Installed Kubuntu now Chrome and Firefox fonts are chunky

I installed Kubuntu/KDE on my 15.04 install to see what it was like, and now my fonts in Chrome, Firefox, Filezilla, VLC, and a few others are this KDE-looking squarish, blockier font. It's not like ...
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0answers
56 views

Cannot login with cable provider information for TV websites

I'm not very knowledgeable regarding Ubuntu, so I'm not sure about the version number or if that is even relevant. I have been trying to watch episodes on the Adult Swim website, but when I try to do ...
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2answers
568 views

How to set a custom page to replace the default Firefox New Tab page

I am using Firefox 40, and I don't really like the New Tab page, so I would really like to set it to the DuckDuckGo homepage, how can this be achieved so that when I click the New Tab button I get the ...
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1answer
43 views

How can I create a new Firefox profile

I use Xubuntu 64 bit version, and i trying make a new profile of Firefox on this system. In windows was command firefox -p but on Ubuntu doesn't work.
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62 views

Firefox 40.0.3 is not saving settings

I'm in Ubuntu 15, I have Firefox 40.0.3. When I restart the OS, Firefox starts as a fresh install, is not saving my preferences. What to do?
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119 views

How to get Unity Web Player working on Ubuntu 14.04

I followed all the instructions to install pipeline and then enable unity3d on http://pipelight.net/cms/installation.html, and then how to get unity3d working in firefox by following the link to unity ...
0
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1answer
36 views

Only allow websites to use already installed fonts and not download their own in Firefox

I have read a lot lately about fonts being malicious, and as a website can just download its own custom font onto your machine so that it can use it, it could exploit something with this and do ...
3
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0answers
194 views

Firefox showing multiple flash plugin versions

I use Firefox 40.0.3 on Ubuntu 15.04 and have adobe-flashplugin and freshplayerplugin installed. Checking Firefox's "Add-ons" tab, it shows me two different versions, but trying to disable (select ...
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2answers
182 views

AnonymoX /etc/hosts override

I have some sites blocked via /etc/hosts-entries. My problem is, that after activating AnonymoX, Firefox can still reach these sites. I tried to block the sites for the fake-ips in the hosts file, but ...
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0answers
69 views

Firefox can not print jpg files on Canon iR2520

I have ubuntu 14.04 and network printer Canon iR2520. When I try print any picture from browser(Firefox 40.0.3) - I can not do it(I can print small picture eq 640*480 etc. fine, but can not print ...
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0answers
44 views

Why network proxy setting doesn't effect on Firefox and Phantomjs browser?

I do try to set up network proxy on my ubuntu. Through Network -> Network proxy and I set mode auto and I add path to PAC file. As a result I saw it work on Chrome browser but when I try on Firefox it ...
4
votes
2answers
272 views

How to get a proper Firefox History view?

I have noticed that unlike in other browsers, in Firefox there is no proper History view as such, because the only way to get a history in the right order is to set it on Most Recent Viewed (if you go ...
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3answers
498 views

Clearing Firefox History via Command Line

Possibly related to this question: Can I view Firefox history with the terminal? I want to create a shell script that clears everything in my Firefox's history (this includes the other histories such ...
0
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1answer
22 views

Plug-in Ristritto Image Viewer with Mozilla Firefox

In xubuntu , There is an application RISTRITTO to view images. I want to plug in this application with mozilla firefox to view any images preview in Mozilla browser. How can I plug-in.Please help.
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2answers
256 views

adobe-flashplugin works for Chromium but doesn't work for Firefox

I have installed the adobe-flashplugin package from the partners source and it worked straight away for Chromium. Firefox is stuck to the old Shockwave Flash 11.2 plugin, which I've disabled. This ...
1
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1answer
62 views

Strange Shockwave Flash plugin appeared in Firefox when I don't use Flash

I recently went to the YouTube website and noticed that it was telling me that my Adobe Flash plugin was being allowed. Now this is very strange, because I do not use Flash for security reasons, and ...
0
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1answer
265 views

How to view youtube videos in 1080p in Firefox?

Since Firefox 40 it plays in HTML5 but can't choose 1080p... Thanks.
2
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1answer
135 views

Help with syntax and customization of .desktop files for Unity

I tried below, and it works as expected. Sandboxing Firefox in a volatile state through Firejail. Exec=firejail --seccomp --private firefox What is this for? And what does it do? ...
0
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1answer
166 views

apache2 can't stop and nginx can't start

I have installed both apache2 and nginx as web server. I found that it is a strange thing that apache2 logo will be still displayed in the firefox when service apache2 stop executed and nginx logo ...
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0answers
52 views

U15.04 browsers crash on file download

Both of my browsers, Chrome (Version 45.0.2454.85 (64-bit)) and Firefox (40.0.3), crash when I try to download any file from any site. Using 15.04 on a thinkpad T61. Tried deleting ...
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1answer
450 views

Uninstall Firefox [duplicate]

Just installed on my new laptop Ubuntu 14.04 and immediately installed Chrome (for programming purposes). I havn't done anything with Mozilla Firefox yet and I want to remove it since I have Chrome. ...
2
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0answers
140 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 ...