not recommend Rated 1 out of 5 stars

NOT good!
It's Very hardly works
not recommend

Rated 4 out of 5 stars

Works well, though it could be improved. I use sticky-keys, so don't know how typical this behavior is, but ctrl seems to get stuck sometimes just for this app, so that it pops up every time any link is crossed. This is sometimes useful! However I haven't figured out how to reliably cause it yet. It may be treating left and right ctrl keys differently. Hitting ctrl twice usually starts it opening all links, and space followed by ctrl usually stops it.
Opens pictures quickly, but websites more slowly, and just shows a blank screen if it can't open a site at all. I haven't figured out why it only opens some. E.g. it will open Wiki, but not YouTube.
Needs an icon instead of having to switch from mouse to keyboard, but still better than other previewers.

What What? Rated 1 out of 5 stars

hit control, hover over a url or link, get a box that says fire preview, then it goes blank.

Quirky behavior causes lockups Rated 1 out of 5 stars

After using a few times, this add-on took on a mind of its own.

It would show empty link windows, link windows without using the hotkey, then cause FF to lockup.

Nice idea but needs more work.

Uninstalled from Windows 10.

Rated 4 out of 5 stars

Sometimes it works (shows preview windows) WITHOUT pressing Ctrl!

Doesn't work Rated 1 out of 5 stars

It doesn't matter how long you hover over a link and press control the mythical preview window doesn't show up. Very disappointing.

This review is for a previous version of the add-on (1.0.rev144.1-signed.1-signed). 

Rated 4 out of 5 stars

The window can not be resized and there is no horizontal scrollbar

This review is for a previous version of the add-on (1.0.rev144.1-signed.1-signed). 

easy and simply Rated 5 out of 5 stars

its very good, i hope in future you eliminate shortcut
keep it up thanks !!!

This review is for a previous version of the add-on (1.0.rev144.1-signed.1-signed).