In addition, if you want to know which font a glyph is coming from, this extension adds "Show Fonts in Selection" to the context menu, in addition to letting yo

In addition, if you want to know which font a glyph is coming from, this extension adds "Show Fonts in Selection" to the context menu, in addition to letting you list every font used on the page and where they come from: https://addons.mozilla.org/en-US/firefox/addon/fontinfo/ https://addons.mozilla.org/en-US/firefox/addon/fontinfo/