The stuff I do

Firefox shortcuts

Tags: [firefox]

Action	Shortcut
Move tab left/right (vimium)	`<`/`>`
Focus address bar	`<C-j>`/`<C-k>`
Backwards/Forward navigation	`<A-Left>`/`<A-Right>`

Custom key mappings

map l nextTab
map h previousTab
map d removeTab

To use search engines site: filter automatically:

Create a bookmark with the the url and %s for the query string like this:
https://www.google.com/search?q=site%3Avi.stackexchange.com%20%s
https://duckduckgo.com/?t=canonical&q=site%3Avi.stackexchange.com%20%s
Add a keyword to the bookmark e.g. v
In the address bar search with v my query