Used to be one of the best Rated 3 out of 5 stars

It's an all time classics, one of the first developer extensions that were available for Firefox. But let's face it: when its author switched to Chrome it started its slow decline and as today it's just abandoned. Not only it hasn't received new features in years—as Firefox upgrades come in more and more features stop working and it's very unlikely that they'll ever get fixed. As far as I know, there isn't even an active channel to issue bug reports.

It used to be great but it's time to move on.

Please update it Rated 4 out of 5 stars

Is shiped by deafult with firefox and doen't have updated almost 2 years ago.
With the constant updates of firefox and the new features, is getting many error in the console like TypeError: document.getElementById(...) is null
Código Fuente: chrome://web-developer/content/overlay/javascript/overlay.js
Línea: 7333

It just works Rated 5 out of 5 stars

Good enough for me

Rated 5 out of 5 stars

Addon ini sangat membantu saya dalam mengatus tampilan website saya.

Rated 5 out of 5 stars

Very good tool, It's now hard to work without it as it gives you a new way to see web development.

Excellent tool Rated 5 out of 5 stars

Best plugin I have. It is very good for me as a Web developer. It takes a lot of work out of usual design problems I encounter frequently.

Sehr gutes Tool Rated 5 out of 5 stars

Sehr gutes udn praktisches tool für leute die mit websiten zu tun haben. Die Darstellung finde ich auch sehr gelungen. Dazu auch noch kostenlos! Einfach Top!

Rated 5 out of 5 stars

Amazing tool! A must-have for any responsive developer.

Tavsiye ederim, rakipsiz. Rated 5 out of 5 stars

Çok sevdiğim bir eklenti çok uzun yıllar oldu kullanıyorum. Tavsiye ederim.

Youtube HTML5 video player troubles Rated 5 out of 5 stars

С недавних пор стало дико тормозить видео на ютубе (через HTML-player), если отключить это дополнение - тормоза пропадают.

В остальном - идеальное и очень нужное дополнение

Good Tool but not maintained for 2 years Rated 2 out of 5 stars

Good tool but hasn't been update for 2 years (Firefox) or 1 year (Chrome, Opera).

Rated 5 out of 5 stars

One of the coolest tool ever! Great

Rated 5 out of 5 stars

Love this extension!

Youtube problem Rated 4 out of 5 stars

Most recent version of firefox and this extension is causing youtube html5 player to freeze and firefox to crash. Please fix.

Top tool Rated 4 out of 5 stars

cool that tool. I use it already for years and I love it.

kind regards


Works great -- Validate Local HTML hangs now Rated 5 out of 5 stars

Love this toolbar and use it a lot, particularly to check Responsive Layouts and to validate code.

One thing .. starting recently, the Validate Local HTML tool just hangs -- the green bar keeps spinning and never resolves. (Validate Local CSS still works). Will there be an update for this?

Even so, I'm giving it 5 stars.

Reset / Cancel modifications needed Rated 4 out of 5 stars

It looks a great module no doubt about that, only flaw is that it needs a 'reset everything' / 'cancel modifications' button after changes have been made.

Even after having cleared firefox"s cache and everything, and removed/disabled this module, changes I made before were still active - for example disabled maximum font size' and enabled 'disabled pages' color' were still active, so everyhing I browsed after that had no colors, fonts setting problems and stuff like that. I think that it's not normal that once the module is disabled/removed (and cache is empty) that changes you made before are still active.

Everything sems back to normal (no 100% sure though), but WD should have done it by itself I think. I may have missed something but honesly I don't think so.

Rated 5 out of 5 stars

Tagline: "Web Developer Addon", saving dev sanity for quite a number of years, thank you.

Need cut option in rules menu Rated 5 out of 5 stars

Need cut option in rules menu and very great this app.

Most Definitely DOES work with SeaMonkey 2.31 Rated 5 out of 5 stars

And remains the champ. This belongs in everyone's tool chest for the quality of its forensics. Bravo again, Chris

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