This addon is something I've never found a perfect replacement for! Simple and effective.
It's basically a really good slideshow for firefox.

It makes me wish it got the updates the chrome version has.

TOP extension.
How can I change the existing wallpaper?

Awesome. Good way to chill between work sessions. Also great way for me to showcase my art. Thanks for the add on, brilliant.

I must say, this one surprised me. Not only is it the only extension (that I'm aware of) that lets you upload custom images, but it doesn't just stop at images. .gif files work too, and as someone who loves Wallpaper Engine, that's a lifesaver. Though, I do wish it wasn't just an empty screen, maybe a few buttons to Youtube or Gmail would be nice.

Overall, if I could rate this at 6 stars, I definitely would. Great work!

Works well, but where's the search bar?

It's perfect when I want "Clear New Tab" with my own Wallpapers. As simple as possible!

I DONT

I love it, its just that simple. I beg you to add the function to activate a search bar. Like the one in Google Chrome's "Material Design New Tab" https://chrome.google.com/webstore/detail/material-design-new-tab/kgfodmcknjlgkbgkkafogbdaibkfgdgo A simple, white search bar. That's all. Until then there are 4 stars :) Thanks!