As usual the only thing holding me back from upgrading is add-on compatibility. Luckily it’s possible to disable the compatibility check so Firefox 4 will let you install add-ons built for older versions, I found that many add-ons work just fine in Firefox 4.

Disable compatibility check

If you’re willing to take your chances, navigate to about:config in your browser, promise not to break anything and right to window click to add a new boolean. In the preference name field, add extensions.checkCompatibility.4.0b and set the value to false. Firefox will now let you install any add-on.

If anything breaks, try disabling add-ons or delete them completely. You can always go back to 3.6 if nothing works, and wait for a new stable release.

I’ve tested it with AdBlock Plus, Firebug, Flashblock and Wappalyzer.

I released it under GPL, feel free to grab the code from the source and do whatever you like with it.

Play the game at elbertf.com/tetris

I’m a programmer myself, I write most of my applications in PHP and JavaScript. I built websites for a living and often work on experimental projects on the side.

This is my first WordPress blog, I used to share science and technology related articles on Blogger but never published any unique content. I also have a discontinued blog on Tumblr where I posted updates about one of my apps, Wappalyzer. I’m going to post the updates here from now on.

WordPress Theme

I started off with the Modicus theme from Upstart Blogger and turned it into something completely different. It’s a work in progress.

Plugins in use

• DISQUS Comment System
• Easy Twitter Links
• Feedburner FeedSmith
• Google Sitemap Generator
• WP Greet Box
• WP Syntax
• WP Typography

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