Opera 8 beta introduces 'User Javascript'

Similar to GreaseMonkey scripts in FireFox

[tedster]

User Javascripts are similar to FireFox's GreaseMonkey extension, but conceived a while ago, and indepently.

User JavaScript is basically a script from a local file that gets executed before any other scripts (or event handlers) on the page, once in every document. With User JavaScripts, you can change layout, elements, behavior, almost anything...

Opera's experimental implementation in Opera 8 (beta 3 and higher) requires some manual work. Which not only means the feature will be limited to power-users, it also means that you can only shoot yourself in the foot after carefully pointing your gun.

[people.opera.com...]

[JAB Creations]

I test with 9 different versions of Opera and while I never use it for anything more then cross-browser testing I must say Opera sure has a target audience in mind. I think thats good considering their browser (from my pov) is the only that specifically catters to technical people.