Each location gets it own newsfeed, where you can see a list of your friends who have been at a place, even if their visit was months earlier.

每一个位置都有自己的消息来源，你可以看到一张去过某地的好友列表，即使他们是在一个月前来过此地。

youdao

"Putting ads there is exactly the same as putting ads into your newsfeed, " she explained.

BBC: Facebook��s future - ads and Android

When your friend "likes" Wiggins Widgets' new TV advert, that is likely to pop up in your newsfeed.

BBC: Facebook��s tabloid new look

So, by replacing the keywords that the the extension is looking for in your newsfeed and changing the RSS feed(s) that it pulls the replacement images from, you can essentially hack the incoming images in your Facebook feed anyway you want.

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