TIL you can set Jerboa as default for opening links to your instances, so you don't leave the app
On Android: App settings > Jerboa > Set as default > Supported web addresses > check whatever you like
I checked my instance's only, so whenever I click some link to a community in Jerboa it I will go directly to the community, instead of it opening in the browser.
Don't think it will work very well with other instances, right now tho. At least not until link redirection is launched.