Answer: it depends on your marketing research. If none of your users / platforms can use Opera now or in the future, then it does not matter. If your company has a large group of solutions, the solution of which supports browsers, and you support Opera, then you have no choice.
On the other hand, if you make decisions and you have little information about your markets or existing statistics from your users, you can go with general studies: http://www.w3schools.com/browsers/browsers_stats.asp
For platform examples, Nintendo strongly supports Opera: http://www.opera.com/devices/
I understand that technology leaders sometimes (like the gaming industry) crowd out the market. They have a strong idea of โโword of mouth, and they can drive trends.
Speaking of word of mouth, the viciousness of your users is generally bad for business :)
To support weird browsers, many developers create libraries that include quirk modes and simply call them, instead of worrying about problems on the page. I am not a web developer, but I understand that there are existing libraries that do this too.
This site also looks promising: http://www.quirksmode.org/
Merlyn morgan-graham
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