• admin
• Aug 22,2011
• In: Uncategorized

Install CSS Viewer add-on in Firefox 4.x or 5.x

Are you using Firefox 5.0?
Then you can get CSS Viewer for Firefox 5.0 here: CSSViewer for Firefox 5.0 v. 1.0.3

After a 4 months delay Firefox 4 is here!

CSS Viewer (a must-have add-on for all web developers) is not compatible (at least official) with Firefox 4.0.

Good news! Following the same procedure as in my previous posts, Install CSSViewer add-on in Firefox 3.6.* and Install CSSViewer add-on in Firefox 3.5.* you can install CSS Viewer in Firefox 4.0.*

Just follow these steps:

1. Copy the following address to another browser than Firefox (so that the pop up installation window will not come out)

https://addons.mozilla.org/en-us/firefox/addon/cssviewer/

2. Download the file cssviewer-1.0.3-fx.xpi

3. Use 7-zip (or any other extractor) to open it and extract it

4. Open install.rdf with notepad (I used Notepad++ to find easily the line I must change)

5. On line 18 you see <em:maxVersion>3.0.*</em:maxVersion> you must change it to <em:maxVersion>4.0.*</em:maxVersion>

6. Save the file and select all the files you extracted and make a zip file

7. Now you must rename the zip file including the zip extension to cssviewer-1.0.3-fx.xpi (it will prompt you if you are sure you want to change the file name extension and you must click yes)

8. Now drag n’ drop the xpi file to Firefox 4.0.* and the installation window will pop up. Install it normally

I have checked it and it works great in Firefox 4.0

You can download a .xpi file I created and checked that it works fine with Firefox 4.0.
Download: CSSViewer for Firefox 4.0 v. 1.0.3

If you have any question or difficulty installing the add-on please comment.

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