imaliar said:
Okay, so I know of 2 Danbooru clones that have done it and I am hoping the original will do it too. What? Adding a Firefox search feature. Gelbooru has it and so does a Thai Danbooru clone known as Akibakko.
Shimmie also does it by an extension. Konachan has it enabled for example
There was a cool extension done by Atachi but I think no longer works