Does not work with Firefox 12.0 Rated 1 out of 5 stars

I tried it out (under Mac OS), but after installing I cannot find any way of using it.

Rated 4 out of 5 stars

I've been using this for a long time. Works for me in FF 3.6.18 with no major problems. Has helped me track down slow extensions in use, not slowing down FF start-up.

I want to upgrade to current FF version. Has anyone had this work in FF 4/5/6?

Rated 4 out of 5 stars

This is a really useful Firefox add-on! Even for non-developers who just want to disable JavaScript on CPU hogging sites like (as I've just discovered techcrunch.com, which calls http://www.facebook.com/plugins/recommendations.php and that uses tons of CPU especially if you had it open in 3 tabs like I did!) I used NoScript to disable scripts on that site (mark it as Untrusted) and Adblock Plus to disable that facebook URL in case I visit other sites that use it (a dead cert). More developers should use this tool to check if their javascript hogs the processor! And more users should vote with their feet by disabling javascript on sites that use too many processor cycles!

This add-on is published to only work on Firefox versions up to 3.6a1pre, but actually works fine on e.g. 3.6.13. You need to use MR Tech Add-On ( https://addons.mozilla.org/en-US/firefox/addon/421/ ) to allow the installation. It would be useful if you guys could update the add-on!

Thanks guys! Thanks to you I also discovered what was causing Firefox 3.6 (didn't seem to affect older versions) to get really slow when I have lots of tabs open: the saveState part of the Crash Recovery feature!

Some suggestions to the authors though:
1. update the spec so it will more easily run on new versions of Firefox.
2. make it easier to identify the website and URL (and copy that information to the clipboard) that a javascript function call comes from.
3. make it possible to identify the tab that is doing the javascript function call, preferably with a GoTo button.
4. possible integration with NoScript and Adblock Plus if installed to block javascript functions you don't want executing (via URLs).

1. I've updated compatibility to 3.6.*
2. Sources have always been updated on mercurial repository:
https://sharesource.org/hg/xulprofiler/
3. Unfortunately, this addon won't be compatible with Firefox 4+ as underlying XPCOM component used to catch JS calls is not working anymore. Hopefully, something better has been implemented, but it will require deep modification to make XUL profiler work again:
https://developer.mozilla.org/en/SpiderMonkey/JS_Debugger_API_Guide

Rated 5 out of 5 stars

Works with FF 3.6.12
Use MR Tech Add-On ( https://addons.mozilla.org/en-US/firefox/addon/421/ ) to allow the installation

Rated 2 out of 5 stars

Doesn't work with 3.6.3 (even when I edited the install.rdf to make it install). Obviously it's out of date.

That's a major bummer. My FF is pushing 90-100% most of the time. I'd love to find the culprit(s).

I can give it a 2 for the hope that it may get updated.
I'd certainly give it more if it was updated to work on the current FF.

This review is for a previous version of the add-on (1.0.6). 

please update it Rated 4 out of 5 stars

Please update it so it can be used with FF 3.6. I really need an add-on to find out which other addons are slowing down my firefox and consuming endless memory. It's a shame that Firefox does not offer any insights in this area as basic functionality.

This review is for a previous version of the add-on (1.0.6). 

Rated 5 out of 5 stars

Simply wonderful!
I had several freezes in my extension and this helped me a lot to understand and patch them...

This review is for a previous version of the add-on (1.0.6). 

Rated 5 out of 5 stars

A must for the serious extension developer. Indispensable!

This review is for a previous version of the add-on (1.0.6). 

Rated 5 out of 5 stars

It's Great !!!!!!!

I use it for finding CPU guzzling rogue websites Rated 4 out of 5 stars

Not sure about Yoono's social networking and personal recommendation sidebar addon; but XUL Profiler is the only Firefox addon I know that helps in finding the particular websites within my tabs that are eating up my computer's CPU - thanks! Not sure if others use XUL Profiler in this way. It's the closest that I can get right now to Google Chrome's individual tab process managing Task Manager - OK, it's not that close. (I can't use Chrome since it requires SP2 for Window XP [so I've been using the alternative SRWAre Iron], and I can't have SP2 because Microsoft detects my Windows as not genuine. Any solution for getting SP2 despite this problem?)

Since javascript problems are a common cause of eating up your CPU and just about freezing up your Firefox, then using XUL Profiler can help you find which website, of all the sites you have open, is responsible for the javascript that is gobbling up the most time. Once XUL Profiler presents the callgraph page, I click to "See" the "Source" of the bar with the greatest "Time" usage. A new window pops up with the source, and the offending URL is right at the top in the title bar. I find that URL website amongst the tabs I have open and close down the tab. When my Task Manager shows that my CPU usage has dropped, then I know I have freed up my system and killed the culprit. No more desperation and fear of that unknown rogue website! Not sure if others use it in the same way or even for the same purpose. Are there other better ways of finding CPU guzzling webpages out of the many tabs that you have open?

Buggy Rated 2 out of 5 stars

Great idea, needs work. On FF2, produces one toolbar button per tab and pops up endless exception windows. I'm hoping 1.0.3 is better; for now I've disabled it.

This review is for a previous version of the add-on (1.0.3). 

Rated 5 out of 5 stars

One more "must-have" add-on for developers, along with Venkman and WebDeveloper! Very useful, great idea!

This review is for a previous version of the add-on (1.0.2). 

Rated 5 out of 5 stars

Very useful.

This review is for a previous version of the add-on (1.0.2). 

Rated 5 out of 5 stars

What a great use of mozafterpaint events!
This tool is going to help us understand how hard we push the layout engine.

This review is for a previous version of the add-on (1.0). 

Rated 5 out of 5 stars

Very useful tool. Previously i used venkman for the profiling but xul profiler give me more "readable" and "usable" informations. Great!!!

This review is for a previous version of the add-on (1.0). 

Rated 5 out of 5 stars

Very cool ! I can foresee many many cases where this will help improve performances!
The repainted zones detection is absolutely unique, never saw anything like that! thanks

This review is for a previous version of the add-on (1.0).