Fabuleux

Great addon support many image search engines(include SauceNAO IQDB Ascii2D)

Great extension for anyone who frequently needs to check image uniqueness or find original sources. A huge plus for being able to customize the list of search engines (Google, Yandex, TinEye, etc.) and search either via a single engine or all of them at once. Works flawlessly.

Very BAD. — Tried to use 1 image with "all search engines". — It opens all kind of tabs, I thought it would be centralized. — And some sites being Asians, they're searching for Asian things that are absoutely OUT OF SUBJECT to my research… — Also uses Firefox notifications for everything, whereas they take time to disappear (not intuitive at all).

I really didn't expect to be able to do this in Firefox, thank you so much!