I just updated Firefox, to my dismay discovered what they did to this amazing Add-on.

The five stars are all for Chris for developing this amazing tool and supporting it over the years. The newest version of Firefox (57) has absolutely neutered this extension. My response goes a little beyond just being sad. I'm actually feeling more than a little shock right now. I'm a professional web developer, and have been for well over a decade now. I've used the Web Developer plugin pretty much continually for as long as I remember. I've shown dozens of people this amazing tool; I've evangelized it all over the place. It truly is a cornerstone of my work and my career, I rely on it every bit as much as I do Illustrator, Photoshop or my IDE.

The new version of Firefox has clearly hobbled this add-on. It's upsetting because I've suffered with Firefox and its infuriating memory hole bugs through the years exclusively because of this amazing plugin. This could finally be the end of my time as a Firefox user. Can I live without this Add-on? Sure, but it undoubtedly makes the design implementation phase of my work much, much more difficult. The built-in developer tools (the likewise neutered Firebug) simply don't cut it, not for writing and editing style sheets.

Chris, I'm not sure how I can thank you enough for building and giving away this amazing tool. I hope the Firefox folks will correct their mistake in the very near future. I genuinely feel a little sick over this, time for a tall glass of wine.

Great add-on, my constant companion for years. But with the latest Firefox changes, 2 of its most useful (to me) features - CSS > Display Style Information and Information > View document size - are gone. Workaround! What I did was: a) Downloaded and installed Waterfox (I have v.55), then (b) installed in Waterfox an older version of Webdeveloper from the URL Chris gave: https://addons.mozilla.org/en-US/firefox/addon/web-developer/versions/ I got Version 1.2.13. (c) Make sure you set Waterfox updates to "let you choose whether to install them" and set the webdeveloper add-on to "Automatic updates: off", otherwise you might launch Waterfox one day and find you've got webdeveloper 2. Adding an add-on to Waterfox is the same as for Firefox - you'll get a message saying "add to Firefox", but if you're doing it from Waterfox, it adds it to Waterfox. All of this is just to keep "the old webdeveloper" working, cannot vouch for it being safe.

Oh and... be careful. Waterfox just advised me to update to the new "responsive design" module (or whatever), which I did. And webdeveloper lost half of its tricks. Will have to restore the system, I guess.

בינתיים עובד ניפלא...

I know the "disable javascript" Tab has gone, but I need to put the javascript on. All slideshows and dropdown menus are no more working since update to Firefox Quantum.
How I can remove the web developer tool complete with all settings and restore the basic settings again.

How to get back the toolbar below personnal bar on top of window please ?

Cette extension est un must, définitivement !

like it,but now,have some problem.firefox 55.03 version not showing properly

The web developer is as important to my web design and site management as any of my Adobe software.

It's a shame Firefox screwed up big time with the new add-ons system. It made this awesome plugin useless for me.
I don't and never will use Firefox 57 so i've crawled the internet and installed the 1.2.13 XPI and then blocked updates.

So 5 stars for the old one and 0 stars for Firefox 57

I love that I can have a tool that I can just click and see the code etc from any website or webpage.