Thok wrote:
You see wepages as on IE.
But some websites designed it just for IE.
These statements are contradictory.
dlowan,
Firefox is a very strict browser that follows Web standards very closely.
Thing is, because other broswers have a long history of not following standards well browsers often parse markup in "quirks mode" when no doctype is declared or when transitional or old doctypes are used.
So because of these rendering "quirks" webmasters often design and only make sure it looks good in IE. What then happens is that it will sometimes not look good in Firefox, which is stricter on the markup parsing.
Standard compliance in markup is a good thing, and strictness with standards may well be the only way to force it. Thing is, forced strictness "breaks" pages that were not designed as strictly.
In addition, some JavaScript is browser specific, this is an even bigger issue than mere display quirks.
Ultimately, most sites are designed and only tested in IE, and this is not limited to small-timers.
Big guys like Google and Yahoo, whose sites undergo months of testing before release have sometimes released sites that fail to support some of the less popular browsers like Firefox.