I'm trying to get myself to finally switch to Firefox thanks to this post. But I'm having problems with ctrl +/- changing of font sizes. In Chrome, that setting affects one domain only. Here I'm getting confused because I open a new tab and the font is tiny or huge, even sometimes on sites I've never visited before. Ctrl 0 fixes it but then I seem to reset sites that I do want enlarged (like HN). What's the logic here? I haven't figured out the steps to reproduce this, it seems random.