问题
I'm trying to create a context menu item with "contexts":["video"] with no luck. The item just doesn't show up when I right-click on a video. So I tried to download this official example and I was surprised to see that all its context menu items where shown as expected except for the video one!
Can anyone provide me an explanation as for what am I missing?
I haven't uploaded any code since the full example I mentioned can be found in its place, this code is supposed to work more than any of my own code :)
来源：https://stackoverflow.com/questions/16749718/chrome-extension-context-menu-for-video-doesnt-work