> - completion while typing It's there. > - display JavaScript data structures in more visual way Sort of? Is the existence of the 'inspect' function enough?

> - completion while typing It's there. > - display JavaScript data structures in more visual way Sort of? Is the existence of the 'inspect' function enough? > - breakpoints on DOM changes, events and Ajax requests I'm not sure about this. I mean, you can set the breakpoints in code per usual but I expect you mean setting them on the nodes themselves and perhaps global breakpoints in the net panel? > - profile network, memory and cpu usage This sort of profiling? https://developer.mozilla.org/en-US/docs/Tools/Performance https://developer.mozilla.org/en-US/docs/Tools/Performance https://developer.mozilla.org/en-US/docs/Tools/Network_Monitor#Performance_analysis https://developer.mozilla.org/en-US/docs/Tools/Network_Monit... > - navigate cookies, indexdb and websql databases https://developer.mozilla.org/en-US/docs/Tools/Storage_Inspector https://developer.mozilla.org/en-US/docs/Tools/Storage_Inspe... By the by, WebSQL isn't part of any standardization track and will not be implemented in Firefox as it stands, and neither will IE it looks like. > - reformat JavaScript code You mean "prettify source"? If so, yes. > - CSS editor There's the Style Editor, and the side pane of the Inspector. https://developer.mozilla.org/en-US/docs/Tools/Style_Editor https://developer.mozilla.org/en-US/docs/Tools/Style_Editor https://developer.mozilla.org/en-US/docs/Tools/Page_Inspector/How_to/Examine_and_edit_CSS https://developer.mozilla.org/en-US/docs/Tools/Page_Inspecto... > - work as IDE I guess the Scratchpad is the closest thing to that. So technically, no. As a side note, there is the WebIDE for Firefox OS development. https://developer.mozilla.org/en/docs/Tools/Scratchpad https://developer.mozilla.org/en/docs/Tools/Scratchpad https://developer.mozilla.org/en/docs/Tools/WebIDE https://developer.mozilla.org/en/docs/Tools/WebIDE > - debugger API to work together with IDEs like Netbeans It's possible with the remote debugging protocol but the only implementation I know of is the proof of concept that Paul Rouget put together two years ago, although I don't think he released any code. http://paulrouget.com/e/devtoolsnext/ http://paulrouget.com/e/devtoolsnext/ > - profile 2D and 3D performance You mean FPS and such? If so see the profiling tools linked previously.