I vaguely remember an add-on (For Mozilla browser??) that you could configure to preload links, that I used to preload pages of webcomics on my subpar childhood

I vaguely remember an add-on (For Mozilla browser??) that you could configure to preload links, that I used to preload pages of webcomics on my subpar childhood dial-up. I would open up the archive page, or first page, go do something else for a while, then start reading, and I would never catch up to the cache.