In Firefox 2.0, the browser ignores the stylesheet PI and USES a custom Firefox view, shown in Figure 1 (a screen capture of Firefox 2.0.0.6 on Mac OS x).

在Firefox 2.0中，浏览器忽略该样式表pi并使用定制的Firefox视图查看，如图1所示(Firefox 2.0.0.6、Mac OS x平台上的屏幕截图)。

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If you want to use the toolbar with Firefox, then you must download and install it using a Firefox browser.

如果需要对Firefox使用该工具栏，那么必须使用一个Firefox浏览器下载并安装它。

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Although this Firefox tool was designed a long time back for a now obsolete version of Firefox, it worked pretty well for me.

尽管这个Firefox工具是很久以前为现在已经过时的一个Firefox版本设计的，不过对我来说工作良好。

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Sensibly, the Firefox versions do not have a pop-up blocker at all because Firefox can do this itself.

BBC: [an error occurred while processing this directive]

We use the term "buy" here loosely, since mobile Firefox will be free just like every other version of Firefox out there -- a key selling point (again, forgive our nomenclature) against rival Opera in the battle for the hearts and minds of the mobile internet warriors running WinMo -- and that's what's got carriers so intrigued.

ENGADGET: Mozilla chatting with operators over Mobile Firefox

So, with all popular vids encoded and every incoming one getting the transcoding treatment, all you really need now is a compatible browser -- Chrome (naturally), Firefox 4, Opera, or IE9 with a plug-in -- and to enroll in YouTube's HTML5 trial linked below to get rolling with WebM playback.

ENGADGET: YouTube starts transcoding all new uploads to WebM, already has a third of its library ready