Archive for the ‘firefox’ Category

Replace your legacy extensions in Firefox

September 27, 2017 Leave a comment

Firefox will switch to a new extension technology and extensions built with the old technology won’t be supported. You must have noticed that several of your add-ons are labeled as “legacy”. More info here.

The site allows you to find a compatible replacement for your Firefox legacy extension.

Categories: firefox Tags: , ,

Pale Moon: an extremely fast web browser

April 16, 2017 Leave a comment

Pale Moon is an open source web browser, based on Firefox. It’s available for Linux and Windows too. Pale Moon focuses on efficiency and ease of use.

Pale Moon is surprisingly fast. It won’t replace my primary browser (which is Firefox), but I’ll use it for some specific sites.

Categories: firefox, linux, windows Tags: ,

convert mp4 to webm and ogv

November 5, 2016 1 comment

I wanted to share an .mp4 file on my webserver but Firefox didn’t play it. It turned out Firefox prefers the .webm and .ogv formats, while Chrome can play .mp4.


Convert mp4 then:

.mp4 to .webm

ffmpeg -i input.mp4 -vcodec libvpx -acodec libvorbis -b:v 600k -cpu-used 4 -threads 8 output.webm

To change the quality, play with the “600k” value (bitrate).

.mp4 to .ogv

ffmpeg -i final.mp4 -vcodec libtheora -acodec libvorbis -b:v 600k -cpu-used 4 -threads 8 final.ogv

Here the difference is the codec (libtheora instead of libvpx).

Maybe I missed something, but the .webm file seemed to me to have better quality than .ogv. So I think it’s enough to support two formats only: .mp4 for Chrome and .webm for Firefox. By the way, in my test the input file (.mp4) had the best quality and smallest filesize, but again, I may miss something.

And here is an HTML5 code that can play your video:

<video controls preload="metadata" width="1024" height="768" poster="images/front.jpg">
    <source src="video.mp4" type="video/mp4">
    <source src="video.webm" type="video/webm">
    <p>Please use a modern browser to view this video.</p>
Categories: firefox Tags: , , , , , ,

Firefox: sync add-ons on your machines

October 13, 2016 Leave a comment

I knew that Firefox could do synchronization with multiple machines but I never tried it. It changed today. I got fed up with the manual sync so I looked after it and found this nice description of the process: . For this you need a free Firefox account.

Categories: firefox Tags: ,

Firefox shortcuts

October 4, 2016 Leave a comment

List of Firefox shortcuts: .


  • Re-open closed tab: Ctrl + Shift + T
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How to speed up Firefox

October 3, 2016 1 comment

I love Firefox but I suffered a lot recently because of its slowness. It ate up my CPU and thus it became very slow. I even started to use Chrome parallely with some sites where Firefox was very slow. Strangely, Chrome was much faster on certain sites. How to speed up my Firefox?

It turned out that it became slow because of one (or more) add-on(s). The best way to speed up your Firefox is to disable ALL your add-ons. Now I’m enabling just some add-ons that I really need, but I do it one by one, and monitor Firefox if it’s still fast or not.

With my add-ons disabled Firefox has become very fast, like Chrome. I should have done it much earlier…

Steps to follow: .

Categories: firefox

A “read it later” add-on for Firefox

September 29, 2016 Leave a comment

At my workplace I found two interesting links that I decided to read at home. I didn’t want to save their URLs and e-mail them to me, so I made a search if there is a good “read it later” add-on for Firefox. And then I got surprised.

It turned out that Firefox has such an add-on by default! That is, such an add-on is included in Firefox and it is called Pocket. Read more about it here.

So I put its icon next to my search bar and started to use it. It’s awesome! It also has a mobile app. so I can read the saved articles anywhere.

Hmm, I’m sure there are lots of other gems in the softwares that we use on a daily basis and we have no idea about them…

Categories: firefox