Firefox can be customised in many ways using the about:config URL. But sometimes, you may mistakenly enter a value or you may want to reverse an entry completely.

However, if you've ever tried to delete a custom entry, you'll know there's no option labelled "delete". It's actually the "Reset" option you want to choose if you want to remove a custom entry. Here's how it's done:

Here's a quickie Firefox hack - there may be quicker ways of doing this, but this is pretty nifty all the same.

Let me explain why I needed to search across all subdomains: on Unreality TV, we have a handful of subdomains, each containing its own installation of WordPress. Now, when I'm writing about a topic for the music blog, I might want to see what else we've written with regard to that person or band or celebrity.

Mozilla FireFox and Opera both have a nifty bookmarks feature which allows you to give a bookmark a shortcut, sort of like speed-dial for websites.

Here’s how it works: Browse to a website you visit often, say this one. Bookmark the site by either pressing CTRL+D or going to Bookmarks / Bookmark this page.

Lifehacker has a post about dragging unlinked URLs to the address bar to navigate.

Let’s say you come across an URL that hasn’t been linked. Select it (careful with spaces at the start and end) and drag it up to the address bar. Release the mouse and FireFox will automagically jump to that page.

In fact, you can even drag regular links to the address bar for the same effect.