Firefox HTML Validator plugin fix (Ubuntu Feisty or Gutsy)
If you have Ubuntu Feisty or Gutsy with the default Firefox installed (meaning you didn’t manually downloaded/installed your Firefox), you might have some problems making the HTML Validator plugin work even after you followed the fix for Linux. I’ve already encountered this problem when I was still using Ubuntu Feisty and then again this morning after upgrading to Gutsy.
The fix is actually for another Firefox plugin: Colorzilla. I was having some problems making the HTML Validator work back then and decided to install Colorzilla first. It also had some problems but after some Googling, I found a fix that worked. The latest Firefox binaries needed to be downloaded and its libxpcom shared objects (libxpcom*.so) overwrite the current ones found in /usr/lib/firefox.
Feeling that I couldn’t do much without the HTML Validator plugin, I gave it one more try. The thing worked!
After upgrading to Ubuntu Gutsy Gibbon, some of my Firefox plugins went crazy (HTML Validator, Colorzilla and NoScript). Then I remembered having the same problems and fixed it again.
Just wanted to post that- might be able to help someone.
Thanks for this Rolan!