Works Great Rated 5 out of 5 stars

If you like to keep your html and xhtml error free for faster downloading of your webpages and better browser compatibility with your web page, this program will show you if there are erros i your code- without you doing anything (just look at the validator button down at the bottom right of the browser). When you click the validator button it will show you what the errors are. So if you made some changes to your code and you want to make sure you didn't create an error or forget an error you wanted to correct, all you have to do is save whatever changes you made to your code, and then bring the web page up in the Firefox browser, look down at the bottom right for a green, yellow or red flag to see if there are any errors, if there are errors just hit the flag (button) and it will show you what the errors are, and with a little bit of guidance on how to fix the errors. What more could you want?

Rated 5 out of 5 stars

Simple to use, efficient in its performance, provides helpful feedback... If you know what you're doing (hint, hint) this is a great tool for web developers and web admins who want to go the extra mile. An excellent add-on! For the rest: please stick to CTRL-U in vanilla Firefox and enjoy the view.

Rated 1 out of 5 stars

Waste of time, just use "HTML Validator"...

Rated 2 out of 5 stars

Nice idea but has a really weird bug that hides login forms on lots of websites, including Gmail! Very strange stuff. Unfortunately, given the choice, Gmail wins over this little extension.

Rated 1 out of 5 stars

Nonsense! Would start because of an error. I should visite their home page, where they try to sell their stuff. Of course, CSE Lite is for free, but why should I install something extra, when I can get it here:
for free and all in one addon?

Rated 1 out of 5 stars

Doesn't work for me. Makes you go to their website to resolve the problem, where they try to sell you their real system. Bogus.