In the UK Revlon hasn't used hydrogen peroxide in over a decade so you should be good, when you're in the store look at the box for the same one you used to be safe. I'm not sure but I think Canada has similar laws to us around hydrogen peroxide so there shouldn't be any in them but don't bank on that just encase I'm wrong.

My hair was really "strong" against bleach and would be really soft if I used good conditioner/masks after too. Until one day it wasn't, I'd used bleach 4 times in 13 months (one or 2 double bleaching as something went wrong) and 2 turned green. Bald spots everywhere. It's back to normal now and I do my hair max once or twice a year to protect its condition/quality. As you're young and it sounds like you haven't had too many disasters yet your hair is still "strong" now but it'll turn like a flip of a switch if you do too much too quick.