Basically, you will have to create an XML file inside the ~/.mozilla/firefox/XYZ.default/searchplugins directory (replace XYZ with your profile's characters, could be any name there), with the following content (I will use Ubuntu Forums for this example):

In this article I will overview several add-ons for Firefox which I consider useful and are also popular among Firefox users. The article is divided into two parts, the first one containing add-ons for users which are not necessarily tech-savy, while in the second I will mention add-ons for advanced users or web developers.

This tutorial was written for Firefox 4 and Ubuntu 11.04, however pretty much everything contained here applies to older releases and will probably work in future versions too. This how-to covers pretty much everything needed to get you started with Firefox: installing Flash, customizing it, installing add-ons and themes, and useful tips for working faster with it.

Apologies for all the Firefox posts today, but like I've promissed in the comments, I wanted to let you know that the Firefox Stable Ubuntu PPA has been updated and it now includes Firefox 4.0 stable for Ubuntu 10.04 and 10.10.

Firefox 4.0 (stable) has been released. Not officially, but is available for download via the Mozilla FTP servers.

Firefox 4 (stable) will be released soon and I though I'd let you know how to install it in Ubuntu 10.04 and 10.10 - the proper way.

If you like how Chrome displays the window controls (close, minimize and maximize buttons) next to the tabs and want this in Firefox, you'll be glad to know it's quite easy to achieve.

A lot of people are experiencing red/pink tint on YouTube videos starting yesterday. The cause seems to be a combination of Flash 10.2, a recent YouTube change and the users graphics cards and seems to be browser-independent (can occur in Firefox 3.x, Firefox 4 beta as well as Chrome / Chromium). Here are some solutions which will hopefully fix the red YouTube videos bug.

While Firefox 4 is still in beta and even though it seems it will be released in March, it might actually be further delayed, the first Firefox 5 mockups are already starting to emerge.

Firefox 4 is knocking at the door and the latest beta release looks just awesome.

Today is the last UDS-N day and a session about the default application selection in the upcoming Ubuntu 11.04 Natty Narwhal is ongoing. Here's what is being discussed:

- Banshee might be included by default in Ubuntu 11.04 (and thus replace Rhythmbox) if it can be slimmed down to fit on the CD

- Oneconf will be included by default in Ubuntu 11.04.

Firefox Elementary theme can now be downloaded from Launchpad, through BZR. Thomas already started working on version 3.0 which includes changes to the tabbar, new graphics and it now recolors with the GTK scheme (of course, you could already use this Firefox theme with any GTK theme, but now it should integrate better)!

Just when I though Firefox 4 is finally coming together, the latest Firefox 4 nightl

Firefox 4 won't have the menu it has on Windows - according to a bug report, but it does have the other new features.

Because there have been many changes to the Firefox UI for Linux lately (last week or so), I made a video showing these new features:

Want a way to try out the latest Firefox 4 (currently beta 5 - released today) without making any changes to your system?

Fewt, the author of Jupiter and member of the Aurora OS (ex Eeebuntu) core team has a really interesting post on his blog about improving your netbook's performance but also increasing the battery life by moving the temp and log files to RAM using tmpfs.

The latest Firefox 4.0 Beta 2 pre brings a long awaited feature: app tabs. This feature is very similar to the "Pin tab" option in Chrome: the app tabs use only favicons for the tabs and all the links you open from an app tab are opened to the right of all the app tabs.

Both Firefox and Opera already released WebM (VP8) capable nightly builds which you can download from here: