Firefox to get JavaScript performance boost. After speed boost, Firefox a developer default? (via dangerousmeta). While performance gains are always welcome (esp in my browser of choice), the conclusion that improving JS performance will lead more developers to target Firefox at their platform of choice is misguided. Similarly, the hope that a JS performance boost will lead to a "mass exodus" of users from IE is overly optimistic.

Developers need to target whatever browser their target audience is using. Better JS performance may get some people to switch to Firefox, but developers still have to target their sites and applications at the browsers people are *actually* using, which means IE, Safari, etc. They also have to either deliver different browser-specific versions of their sites or take a lower common denominator approach and develop one site that works on all browsers, albeit without all the benefits that any specific platform might deliver.