This extension is absolutely indispensable in the toolbox of every web designer / frontend developer. But..
With the restrictions of the latest 'updates' of Firefox the workflow of this awesome add-on is completely DESTROYED

It's like forcing the dentist to drill teeth with a rake..
My advice:
1. Download the last working version -whit this add-on- of Firefox (be sure to disable automatic updates!)
- http://ftp.mozilla.org/pub/firefox/releases/56.0.2/win64/nl/

2.Install the one and only working version of this fantastic add-on (Version 1.2.13)
-https://addons.mozilla.org/nl/firefox/addon/web-developer/versions/


Can someone give me advice about a software package / IDE that offers the same functionalities (and front-end workflow!!) of this add-on?

Yes, OLD VERSION WAS MUCH BETTER. No more toolbar and the best functions are gone.

I hardly miss the "View Style Information" functionality from Version 1.6 ... 1.9, showing exactly the css files, where the active style information is located. Bring it back please.

Thanksalot.

sản phẩm ,dịch vụ ok

Çok kullanışlı ve pratik. En küçük detayları bile inceleyebiliyorum...

thank you

This is endlessly useful. I rely on it every day. Thanks!

good

really useful

Nice!