Usually on Firebug, when inspecting an element, I get a list of fonts, and will actually need to go to the system’s Fonts folder and check the names one by one to see if that’s the one being used. Is there a way to show the font being used directly using Firebug?
Or if Firebug doesn’t have this feature, can any other add-on do that?
You can edit the list of fonts on the font declaration in firebug.
Starting from the first font, I stick an ‘x’ in the name. If the font on the page changes, that was the one used.
If it doesn’t, I go down the list renaming the fonts until one changes or I get to the default.
There is no way, programmatically, to determine which font is used when a web page is being viewed.