This tip helped my browser to stop crashing. Thanks.

instead of installing a real editor you could also use the real editor already installed: vi

if you are a real linux noob:

edit the file by typing

vi /home/user/.browser

move the cursor to the line containing engine=opera
enter edit mode by typing a or i
change opera into microb
press the "back" button as an escape to leave edit mode
type :wq to write the changes and leave vi

restart browser and your done!