> - 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?
> - 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.
I currently have 1290tabs in the tab bar, about ~40 of them loaded with memory usage around 2GB for the whole browser without noticing any issues.
My most CPU intensive extensions are Stylish @ 3%, µUblock @ 2%, and All Tabs Helper @ 1%. For tabs it's about:performance @ 22%, a YouTube video @ 6%, and a paused YouTube video @ 2%.
This is with Nightly (binary downloaded from Mozilla) on a 4core 3.7GHz AMD CPU, with an integrated 8core GPU: the A10-7850K running Gentoo Linux.
"I think hanging someone is worse than just giving them poison."
I don't particularly care about this spyware debate but I can't see how something bad being better than something else bad bears any relevance unless we are talking about choosing between two bad options.
Looks pretty "even" to me? Mostly the things Google seem to be focusing on is things they can use in their services or that can use their already existing services as a back-end, for example speech synthesis.
> implements the Push and the Notifications API
Push API is available in Firefox Dev Edition¹·².
> Along with other features, like giving access to the phone's camera
What do you mean? This is available via the same API in Firefox.
> giving each website its own "window"
Think you could clarify what you mean with "window"?
Pocket were added as it were easier than implementing their own Reading List, although Pocket will be shipped as a default extension in the future rather than being integrated.
https://bugzilla.mozilla.org/show_bug.cgi?id=1215694
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/Network_Monit...
> - navigate cookies, indexdb and websql databases
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/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/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/
> - profile 2D and 3D performance
You mean FPS and such? If so see the profiling tools linked previously.