Very handy! Rated 4 out of 5 stars

This is a very handy addon! Only thing I would recommend would be better documentation and commenting of the source code, and it's not immediately obvious what those arrow buttons are in the top right (maybe they could have title= attribute set to an explanation).

Rated 1 out of 5 stars

Doesn't work. I right-click to 'start diff' and when I go to another page I never get the "show" diff option.

Rated 5 out of 5 stars

This is one of my fav addons, a must have for web developers.

Rated 5 out of 5 stars

This add-on saved me possibly hours of work when trying to find what had changed on a site I was working on. The background had randomly re-sized and the text had spaced out and there was nothing in the editor that had changed. I popped up the new preview link and the old preview link and brought up the difference in the html and had the site back to normal within a couple minutes.
Awesome Add-On!
Thanks So Much!

Rated 4 out of 5 stars

Good addon, but adding possibility to compare text instead of HTML will make it great.

PageDiff creates extra attributes?! Rated 1 out of 5 stars

I was very pleased to find this add-on but in practice it made me mad! The output suggested there were attribute in the tags like Class="" ! In the source of my FireFox 3.6.6 (under Windows 7) browser I never found those attribites! It is really a pity!

Text compar rather html. Rated 3 out of 5 stars

In my project, most of the time I need to print difference between my developed code vs older version. We are not using beyond compare. I would like to add any add on which will compare content comparison rather HTML comparison.

Rated 4 out of 5 stars

I like that extension a lot but I think it makes more sense to calculate the difference based on the DOM tree and not the pure source code.

Based on Khadir Abdul add-on I developed a Firefox extension that compares the DOM of 2 pages. More info here: http://www.mugo.ca/Products/DomDiff

This review is for a previous version of the add-on (1.4). 

Feature Requests Rated 5 out of 5 stars

Hey, great stuff! It would be handy if along with the line selection there were a subselection showing exactly what in the line had changed. Generally not an issue with short lines, but gets hard to see what's going on when developers don't bother with cosmetics like line breaks :)

Also, a running page view of where the diffs occur down a long page would be great.

Anyway, thanks for this!

This review is for a previous version of the add-on (1.4). 

Rated 5 out of 5 stars

Amazing, Bigggg thank you to the developer.

Works perfect, i was using "Win Merge" for doing this.
I have to save the source every time, this addon save me lot of time.

Great thanks.
Regards
http://www.webworldguru.com

This review is for a previous version of the add-on (1.4). 

Rated 5 out of 5 stars

This might be the thing that finally makes me convert to Firefox. It does exactly what I want.

This review is for a previous version of the add-on (1.4). 

Rated 4 out of 5 stars

Excellent timesaver!

This review is for a previous version of the add-on (1.3.0). 

Great, but... Rated 4 out of 5 stars

Great extension - ALMOST exactly what I was looking for. If it could also compare the output (pages as seen in a browser) in addition to comparing the code, I'd be in heaven.
I don't know much about building extensions, so I can't tell if such option would be easy to implement, but I sure could use it... ;)

This review is for a previous version of the add-on (1.3.0). 

Rated 4 out of 5 stars

so far so good... i was surprised that this can check HTML codes between pages... I hope more features will be added.. good job sir!

This review is for a previous version of the add-on (1.3.0). 

Rated 5 out of 5 stars

Very nice.

This review is for a previous version of the add-on (1.3.0).