1.1) edit DefaultEngine.ini – and under [SystemSettings], double check the r.setRes setting to see if it’s set with your specs. it should look something like:
r.setRes=WidthxHeight
for example:
r.setRes=800x600
do note: this is the “game resolution” – what the engine uses – the canvas resolution is different (to be addressed below in 1.2)
1.2) what version is your browser? i just tried it on mine (firefox 50.1.0 on my OSX laptop) and your project runs full screen and back fine.
that said, i do know there is currently a problem with “black borders” around the top and right side of the canvas every now and then (very visible when you just adjust the width and height of your browser). i already have a task on that (UE-36341 & UE-32311) and am working on it presently.
- mouse control “take over” is easy to trigger on your scene - (again, i’m testing on firefox on OSX) move the mouse out of your game canvas and then back in – on the next click, the browser will try to “lock it” (i.e. “hide it”).
i know you shouldn’t have to move the mouse off canvas all the time to “fix this” – but i do have a on this (UE-35292) to clean up the mouse capture handler. not sure when i’ll get to that. i’ve got some big features to work before i get to that. 