How to apply for upgraded permissions
If you want canconfirm, you can add it yourself using
the triage request form.
If you want editbugs, open a
new bug requesting permissions
The URLs of two bugs to which you have attached patches
or testcases; or
The URLs of the relevant comment on three bugs which you
wanted to change, but couldn't, and so added a comment instead.
editbugs implies canconfirm; there's no need to apply for both.