extensions development-- firefox or chrome

Question

I'm going to implement an extension, which is kind of similar to GreaseMonkey. Just wondering which browser I should pick: Firefox or Chrome? Which one has better technique supports?

Answer 1

There is a clear technical critiria: If you need low level functions (e. g. as in Firebug or iMacros) you must use Firefox, as the Chrome API is not (yet?) as powerful as Mozilla XUL.

For example, there is an iMacros for Firefox and and iMacros for Chrome. The chrome version can not automate up- or downloads and click Javascript dialog buttons because of limitations in the Chrome API. iMacros is a very good example here, because it exists for IE, Firefox and Chrome and it attempts to automate all browser functions, so you immediatly can see what can be automated and what not.

From a user perspective, Firefox is still(?) more popular. That is another point for Firefox.

From a developer perspective, it is easier to get started with (simple) Chrome extensions.