Aren't FireFox extensions based on JavaScript? Wouldn't faster JavaScript in FireFox directly benefit the extension developers who are trying to push the browse

Aren't FireFox extensions based on JavaScript? Wouldn't faster JavaScript in FireFox directly benefit the extension developers who are trying to push the browser UI into new places? I agree that speed isn't the only important factor but the Mozillia folks are working hard to keep up with WebKit based browsers on performance so Google's focus on speed will ultimately benefit Firefox users as well.