That is certainly an idea. For now I just wanted to get it out there.
Practically, I do feel that a bookmarklet is less intrusive than a browser plugin. A plugin would also have to be written differently for each browser.
But yes I could offer it as an option and it's certainly a possibility. Thank you.
I definitely also see the appeal of not having to install anything :) Could just imagine it'd become quite bothersome having to reactivate it repeatedly.
That said, recently I'd moved away from Firefox because the developer console stuff had gotten a little bulky and they felt sluggish. Hopefully they also get around to optimizing it for performance someday too.
Console feeling bulky? Make sure CSS > Log is disabled. If this is enabled, your page gets a reflow listener that makes it slower.
Also, consider turning off logs you do not need. We have turned off css warnings by default, and we will continue to turn off more kinds of messages by default, soon.
I completely agree with the "7 was little different from Vista" claim. I had purchased Vista Ultimate (stupid me) and then my only upgrade path was 7 Ultimate, which was so little different from 7 Pro that I completely regretted buying Vista. Especially when I found that the XP -> 7 upgrade price was the same as Vista -> 7 upgrade price.
