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Testing minor browser version compatibility

hello i want to know how do you check if a web page you built is same in all browsers. I'm testing on IE8 mozilla and chrome. I pass my pages from html and css validation test, and leave only 1-2 minor warnings. Do you think that's enough?

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No. That's enough, you need a full unit test suite with 100% code coverage, you need automated integration/regression tests or a full QA department, and you need to test in all the browsers you care about (You care about the browsers your users user) –  Raynos Feb 22 '12 at 20:20
You forgot Opera. It has a different rendering engine than the ones you mentioned. –  user16764 Feb 22 '12 at 20:24
yes indeed, my major problem is IE :D –  greco Feb 22 '12 at 20:25
Don't forget Safari. –  FrustratedWithFormsDesigner Feb 22 '12 at 21:53
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marked as duplicate by Jarrod Roberson, Mark Trapp Feb 22 '12 at 21:54

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You can't be sure how it'll behave everywhere, unless you've tested it everywhere. This means every browser on every operating system in every language in every resolution.

Naturally, this isn't possible, but at the very least you have to test it on what your users are most likely to be using - and that does mean several browsers on several OS's. To help you in that direction, browsershots.org can get you screenshots from a lot of that.

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