what browser should i use on k1 ?

I used to use chrome, but it doesnt perform as the bb10os browser.

What are you missing?

I vote for Brave browser, FOSS, Samsung browser and FireFox Focus as the four browsers that get the job done on the KeyOne for me.

Disabled Chrome along any Google app except PlayStore and Play Services.
Also disabled the Hub, BBM and any other BlackBerry App I could get away with disabling.
Now phone performs better and as a plus, got to discover other browsers that work well lol

Avoid Chrome unless you like your battery getting drained.