I really never bothered to take a look at the available themes for the Firefox browser thinking that all they would do was to add more Kilobytes to Firefox's memory consumption.
Besides that: what cool looking themes could possibly be available for Firefox anyway?
With some time at hand I decided to explore the depths of all themes published for Firefox at the Mozilla website and try the ones that would appeal to me.
But first, I had to find a way to enable those new themes which is not as trivial as it sounds.
Firefox themes can be enabled in the same menu that is used to enable and disable extensions. Click on Tools > Add-ons to go there and select Themes from the tab menu there. Firefox has to be restarted every time a new theme is activated.
Update: A lot has changed since the initial article was published back in 2007. Mozilla changed the interface of Firefox several times and introduced lightweight themes to the browser as well.
Once of the consequences of this is that several of the themes listed below don't work in new versions of the web browser.
I have added compatibility information to all of them so that you can see on first glance if a theme is compatible with your version or not.
1. Microfox (compatible up to Firefox 2.0)
2. Gray Modern 2 (compatible up to Firefox 3.6.x)
3. Curacao (compatible up to Firefox 3.7)
4. Scribblies Kids (Compatible with all recent versions)
5. Phoenity Modern (not available anymore)
6. Red Cats (not available anymore)
7. Outlook 2003 (compatible up to Firefox 3 beta)
8. Noia 2 Lite (compatible up to Firefox 2.0)
9. Halloween (Compatible with all recent versions)
10. Glorywine (not available anymore)
11. Abstract Classic (not available anymore)
12. Redshift V2 (compatible up to Firefox 3.6.x)
13. Littlefox (Compatible with all recent versions)
14. Metal Lion 300 (not available anymore)
You can check out all complete themes for the Firefox web browser on Mozilla add-ons.
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