I just added preview from imgur links in fleebmarket, and I must say, I'm pretty amazed by how this looks !

Like any good thing, this does not come without downsides:

• the preview uses the imgur embed mechanism (in order to comply with imgur TOS, and because this was much easier to implement). This means running imgur custom javascript code, which sideloads its own bloatware (facebook, alexametrics and whatnot). I recommend using ublock to only allow javascript from imgur.
• pages are much heavier to load, both in terms of network usage, and cpu time.

I'll try to mitigate some of these issues, but the core of the problem is here to stay. For those that do not want the preview, it is possible to completely turn it off using the appropriate switch in the UI.

The next step is to enable preview from google images, and to improve the link parsing mechanism.

Happy shopping !