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Firefox is a free, award-winning web browser from the Mozilla Corporation. This “recipe” will tell you how to install and use some Firefox extensions that have not been marked as compatible with Firefox 3.

Instructions:

• There are two ways to install “incompatible” extensions. The first involves editing the install.rdf file that is a part of every Firefox extension. The second method uses another Firefox extension call “Nightly Tester Tools”. I have not used the Nightly Tester Tools method and cannot say for myself if it works, but I know some people have used it and achieved very positive results.

install.rdf

To get add-ons to work with Firefox 3 by modifying their install.rdf files, you can execute the following steps:

1. Go to addons.mozilla.com and navigate to the page for your extension.

2. Right click the green “Install Now” button on that page. On the context menu, click “Save Link As…” and save the .xpi to your desktop*.

3. Extract the .xpi file on your desktop and open the extracted folder. In it you will find a file called “install.rdf”, among others.

4. Open “install.rdf” in a text editor, and find the line that reads “em:maxVersion=” (If there is more than one line that says “em:maxVersion=“, then find the one for Firefox or change them all.)

5. Once you have found the correct line, replace whatever value the maxVersion is currently set to with “3.0″, then save and close the file.

6. Now, create a new .jar archive that contains all of the files that were in the original .xpi and the modified install.rdf.

7. Rename your new .jar archive into a .xpi file (.xpi files are just .jar archives).

8. Open the new .xpi file in Firefox, and click to install it. Once the extension is finished installing, click the “Restart Firefox” button.

Nightly Tester Tools extension

To get add-ons to work with Firefox 3 by using the Nightly Tester Tools extension, you can execute the following steps:

1. Download and install the Nightly Tester Tools extension or the Nightly Tester Tools Lite extension.

2. Follow any instructions you may be given, then restart Firefox.

* For some reason, on my computer at least, I was unable to save some of the files I tried to download this way. If you find that you cannot download a file, try to find it and download it from the Mozilla FTP.

Tags: internet