[Owncloud] bookmark sync

[Robin Appelman]

> im not familiar with bookmark sync services. so i cant say if one is better. 
> but firefox sync seems the way to go. that way if we develop a chrome plugin 
> it will work with ff sync too :D

The "problem" with ff sync is that it is, from what I understood of it, client 
side encrypted, while this is great from a security/privacy pov, it means that 
ownCloud won't be able to access the bookmarks.

 - Robin Appelman