does arc browser allow for android app shortcuts and widgets? Retroach?
It allows android apps and shows them as "system", like nes, genesis, snes etc.
Arc Browser can also download art for android games from thegamesdb.net
There are no widgets
Arc Browser is more like frontend for emulators, so you do not need to have Retroarch as a separate application in Arc Browser running as default launcher, because each system has a separate Retroarch core attached to it for running games.
And you always have access to all the settings of Retroarch during the operation of any core.