Useless. It did not work on Firefox

There are two big problems with HTML5 Editor. 1 - no syntax checking, only beauty mode. 2 - problem with suspend mode with my Linux Mint, I cannot awake my desktop. After deleting the add-on from my Firefox-76 my Linux works fine again. So, bye forever!

I like it. But there are two important things I miss: I cannot resize the four areas or remove the space wasting stuff on the left. And I cannot have a spell checker and thus often have typos in my HTML text written I don't notice. So this is okay for playing around with HTML/CSS/JS but the two issues mentioned above unfortunately make it unsuitable for any productive tasks.

Despite the "beginner friendly" description this add-on is quite good. Maybe not too intuitive or too excessively documented but also not really hard to figure out.

This program is amazing. I am moving from html to html 5 and css 3. I can try things in real time! I make a change and click the run button in the upper right hand corner and I know if my change works. I don't know if you can get links to work but I did not get that far yet.

I barely know how to code and go to tutorial sites where the information is free to use. I then modify it to suit my needs. The program can't read my mind but it is handy to test things.

There is a section for java scripts. I don't know what java scripts are but I am going to find out and see if I can get one to run!

I am not trying to be productive. I am learning to create a web site. this application is extremely helpful. It makes the learning and research fun.