Making Firefox 1 extensions run on 2.0
Hi guys... today we're not talking about Microsoft products, but Firefox! Of course I have installed IE 7, but my first comment about it was: "How come it looks like Firefox, but without extensions!" 
The things I love the most on Firefox are the extensions. I use 32 extensions installed on my machine here. But since I installed Firefox 2.0, some of the extensions were not working anymore. One of it is ImgLikeOpera, which helps me download web pages faster because I can selectively choose which images to show.
Actually with a little hacking we can make those Firefox 1 extensions working on 2.0. This is how:
- Download the extension.
- Rename it into zip (e.g. imglikeopera-0.6.9-fx+mz.xpi to imglikeopera-0.6.9-fx+mz.zip). A Firefox extension is actually a zip file, like the new Office 2007 OpenXML format (docx, xlsx, pptx, etc.)
- Open the zip file using WinZip or WinRAR. Otherwise, you can also run WinZip or WinRAR and then open the xpi file using "All files" filter.
- Drag the install.rdf file out of the archive to your desktop.
- Edit the install.rdf file. Find the
<em:maxVersion>1.x</em:maxVersion> string and change the 1.x to something greater than or equals to 2.0.0. You can even specify version 3.0. For example:
<em:maxVersion>3.0</em:maxVersion>
- Drag the file back to the archive and confirm when asked to replace existing file.
- Close WinZip or WinRAR.
- Open the Add-ons list (Tools > Add-ons) menu and drag the xpi file to it.
- Firefox will wait for a few seconds, and then allows you to click the Install Now button to install the extension.
- After the extension is installed, restart Firefox.
- That's it!