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When I visit some sites (so far Tweetdeck, Tumblr, Launchpad, Google Docs) in Firefox, I get a "Would you like install {whatever}" popup from Ubuntu. My options are only yes, "not now" and "don't ask me again."

I don't see any way to get more information about these installations. I can't quite tell if they'd be browser plugins or regular applications (the Ubuntu icon suggests the latter) and I don't see any indication that I can get more information about one of these applications before I install it.

I'm hesitant to click "yes" just to see what happens.

What is going on here?

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marked as duplicate by Jorge Castro, guntbert, Eric Carvalho, Seth, karel Dec 14 '13 at 10:04

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 2 down vote accepted

I am not a big fan of them but they seem to be not much more than a glorified bookmark of the page in your launcher with some integration in the launcher. I think they are called 'webapps' so you can find some more general info on them, for example in this link

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And indeed, the webapps preferences are in Firefox's preferences. I just didn't recognize them. – Amanda Nov 7 '13 at 13:52

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