Can't live without this Rated 5 out of 5 stars

I am using it since i knew that there are add-ons. As a web developer always need this plugin. you may still can improve it though.

But not working in v57. Please updated for newer Firefox version.

Plans to update to 57? Rated 5 out of 5 stars

Any plans to update to the new API for Firefox 57+?
Been using your great addon for years. If there are no plans I'll have to finally look for a better browser...

edit: Awesome, thank you!

Yup, I have a new version that is about 90% ready. It’s a complete rewrite as a WebExtension and I’m hoping to release a beta version soon.

Cheers,
Chris

good job, ERROR view source code Rated 5 out of 5 stars

I looked at an error in the "view source code" button, it does not work with 55.0.3 (64-bit)
Greetings.

This user has a previous review of this add-on.

Works! Rated 5 out of 5 stars

Great plugin

Rated 5 out of 5 stars

This really is the best plugin available that gives web developer tools. There is no plugin that I have found with the features that this has. I use it for testing my websites and it has really helped.

Responsive Design Mode Rated 4 out of 5 stars

Enabling this add-on will prevent the new Responsive Design Mode (available since FF 52) from being used.

Ace Rated 5 out of 5 stars

Been using this forever now. Still the only tool I'm aware of that offers view source and view generated source.

Language Rated 5 out of 5 stars

Please, translate addon on russian language

E10s support? 55beta1 is out. 54 is production Rated 5 out of 5 stars

E10s will kill this by November 17 if no action is taken. Sad that this should be

compatibility issue Rated 4 out of 5 stars

Your wonderful addon is disabled in Nightly (64-bit, v.55) and due to its legacy code it can't be re-enabled.

It Won't Turn On! Rated 1 out of 5 stars

It Does Have Error on My Nightly. PLS. FIX IT!

Rated 2 out of 5 stars

Ft

Rated 5 out of 5 stars

great!!

Great (but display style info is NOT working) Rated 5 out of 5 stars

This is a great tool for honing your html skills. But, as noted by other reviewers, in FF 52, the tool I use most (display style information) is not working anymore. Known bug in FF 51+.

This review is for a previous version of the add-on (1.2.12). 

still great Rated 5 out of 5 stars

5 points, also to compensate the 1 star rating of the 2 dickheads below.

This review is for a previous version of the add-on (1.2.12). 

A must for developers Rated 5 out of 5 stars

A must for developers

This review is for a previous version of the add-on (1.2.12). 

CSS Rated 1 out of 5 stars

"Display Style Information" not displaying anything.

This review is for a previous version of the add-on (1.2.12). 

Display Style Information Rated 1 out of 5 stars

Display Style Information not working..

This review is for a previous version of the add-on (1.2.11). 

Problems in FF 51.x Rated 5 out of 5 stars

"Display Style Information" not displaying anything.
It does work in FF version 50.x and 52.x

This review is for a previous version of the add-on (1.2.11). 

Sehr gut Rated 5 out of 5 stars

Leider fuktionieren die Style-Ansichten nicht mehr seit dem letzten Firefox Update(Januar 2017). Ich hoffe, es wird möglichst bald ein Update bereitgestellt. Betsen Dank.

This review is for a previous version of the add-on (1.2.11).