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3.7. Opera 4.x – 6.x

Subsequent releases of Opera have built upon its solid reputation for supporting the latest CSS code. Opera 4.0 came out in June 2000, and was the first browser to begin seriously implementing CSS2 properties. This included support for such things as the CSS2 table-related properties, dimension properties (i.e., width, min-height, etc.) and provided better support for absolute positioning than did Internet Explorer 4's relatively tentative support in this area. This version of Opera also included a single browser-specific CSS extension, called replace, which is designed primarily to render images in XML documents.

Beginning with Opera 5.0, the browser became freely available, though in what's called an “ad-ware” format, where banner ads appeared within the browser itself. To get rid of the ads, you had to buy the browser, though it is worth noting that the ad-based and ad-less versions of the browser do not affect the way CSS code is rendered. This version of the browser had few substantial improvements for its CSS support, but in part that is because its support is quite good already. This version of the browser does have some problems when it comes to displaying absolute positioning code, and its handling of extremely large and small font sizes is odd — resembling that displayed by Internet Explorer.


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