[yfkar]

One thing where I've used Firefox devtools instead of Chrome is when debugging font usage (which is not very often).

Chrome tells you the used font for a single element on a pretty generic level, e.g. "Lato — Local file" or "Lato — Network resource".

Firefox Inspector has a Fonts tab that lets you list all the fonts used on a page. It tells you a more specific font name, e.g. "Lato Regular", the relevant @font-face rule and also the font URL if it's a network resource.