Rated 4 out of 5 stars

Excellent

This review is for a previous version of the add-on (1.05). 

Rated 5 out of 5 stars

Along with iMacros and Web Developer, this is one of the top web development add-ons.

This review is for a previous version of the add-on (1.05). 

Rated 5 out of 5 stars

Great :)

This review is for a previous version of the add-on (1.05). 

Not yet rated

A great tool I have ever used.

This review is for a previous version of the add-on (1.05). 

Rated 5 out of 5 stars

Firebug makes Firefox THE essential browser for any and all web design and development work. It has set the bar for web development tools and so far, no competing product has come close to offering the power, flexibility, convenience and ease of use that Firebug presents to web professionals.

This review is for a previous version of the add-on (1.05). 

Priceless Rated 5 out of 5 stars

I design a few sites and work with css and php quite a bit. This addon makes my work so much easier. I saw a friend using it, and he showed me how it worked, and I was drooling. If you do web dev of any sort, this is for you. I agree with the other posts, this should be part of the core of Firefox.

This review is for a previous version of the add-on (1.05). 

A very nice tool to learn CSS Rated 5 out of 5 stars

I have been learning CSS for a few months and a friend of mine recommended this add-ons. I find it a very useful tool to help me learn and hopefully will be able to design my page better.

This review is for a previous version of the add-on (1.05). 

Rated 5 out of 5 stars

Firebug is an excellent tool for web developers as well as for web designers. I've been using it for more than a year and it helps me everyday. I highly recommend this tool to experienced web developers as well as new comers.

This review is for a previous version of the add-on (1.05). 

Rated 2 out of 5 stars

I will give it 4 stars if it allows editing of CSS on local.

This review is for a previous version of the add-on (1.05). 

Rated 4 out of 5 stars

Couldn't imagine doing any web development without it anymore. Only idea for improvement: it would be great if a website's tidied up source (javascript/HTML) could could be extracted somehow easily.

This review is for a previous version of the add-on (1.05). 

Rated 5 out of 5 stars

Javascript development without Firebug is unthinkable.

This review is for a previous version of the add-on (1.05). 

Most used Rated 5 out of 5 stars

As a web developer, Firebug is my most important and most used add-on.

This review is for a previous version of the add-on (1.05). 

Rated 5 out of 5 stars

Can't even attempt to do javascript development without Firebug.

This review is for a previous version of the add-on (1.05). 

10+ for Joe Hewitt (fix the thereaftermentioned minor shortages of Firebug, please!) Rated 5 out of 5 stars

Firebug is "the" most needed extension for anyone who wants to examine
& edit webpages and should be integrated as part of Firefox! I personally
cannot live without it anymore (although Aptana uses an older/other version
of Firebug which is confusing!?). I would give Firebug 11 out of 10! if there
where not a few shortages embedded in Firebug, which should be fixed
to make it the ultimate application. This shortages are:
1) When examining or editing (not embedded) CSS (or javascript), you cannot copy
the code!!! (like you can do this when doing the same with the HTML code,
and you are forced to use e.g. the Web Developer extension to write there again
the modifications and after that copy the CSS, which is very inconvenient).
2) When examining/editing CSS, you cannot add a new class!!! but only edit
the given classes/ids in the right panel under style (and you are forced in this
way to go to the edit mode for the whole CSS file).
3) When you are editing HTML or CSS, you cannot "paste" any code!!! (so you
are forced to use the Web Developer extension since it has the "paste" option,
which is very inconvenient to change applications all the time).
4) You cannot (after editing) save the CSS code!!! (even Firefox does not save
the changes that you have done when you try to save the altered webpage
through the browser ; you have to go to the Web Developer extension and write
again there all the changes that you want to do and then, after that, copy the
whole CSS; only in this way can you save the modified CSS code, which is very
very disturbing).
5) You cannot "save" (after editing) the modified Html code!!! (You are forced to
save the webpage through Firefox to save the altered Html code or to go to the
Web Developer extension, and there write again all the changes that you want to
make, after that copy the new Html code from there to e.g. Notepad, and then
save it in a file, which all is very inconvenient).

Please, do fix this shortcomings, and since we can not imagine our lives without
Firebug, we are looking anxious after that. Firebug, the name says it all !!!

This review is for a previous version of the add-on (1.05). 

Best Tools Ever! Rated 5 out of 5 stars

Best developpement tools ever.. and I make website since '96! THANKS!

This review is for a previous version of the add-on (1.05). 

Best "Swiss army knife" for FireFox. Rated 5 out of 5 stars

This plugin as so usefull i wonder why it aint in the default FF install.
No matter if you are a hardcore developer, a beginner or just an occasional curious user:
This plugin will show you information about webpages that makes you addicted to it!

If you dont care about inner workings of a webpage then stay away of this.
But you are ofcourse otherwise you would not be reading this :P

This review is for a previous version of the add-on (1.05). 

Absolutely indispensable Rated 5 out of 5 stars

This tool is THE BEST and most useful web development tool out there, and it's free! If you spend any time at all making websites, install this add-on immediately.

This review is for a previous version of the add-on (1.05). 

Designer Must Have ! Rated 4 out of 5 stars

Having problems finding a CSS declaration affecting an element in your application view or your "Joomla! " C.M.S. template? Then get this add-on and in no time, the culprit is identified in real-time.
How many bottles of Advil this will save interface designer's is reason enough to install it, and for examining tricks used by awesome sites to generate those inspiring layouts and effects Firebug becomes a tool second to none.

This review is for a previous version of the add-on (1.05). 

best plugin. Rated 5 out of 5 stars

More valuable than firefox itself.

This review is for a previous version of the add-on (1.05). 

The most impressive add-on Rated 5 out of 5 stars

Couldn't work without it.

Thank you so much, keep the good work.

This review is for a previous version of the add-on (1.05).