
How do I discover what font Firefox is actually using?
How do I discover what font Firefox is actually using? Inspect Element does not tell me what font is substituted.
Chosen solution
Firefox 24 ESR has the Fonts tab in the Inspector, so that shouldn't be a problem.
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There is a panel for that in the Inspector. On the right side, where you normally see CSS rules, look for the Fonts tab. It should show the actual font being used by the element selected in the HTML "tree" on the left side.
Oops, you posted using Firefox 24. It might not have been in that version yet. Are you waiting to make the leap to Firefox 31 ESR because of... ??
Note that you are a little behind on updates: 24.8.1ESR was released on Sept. 24.
Before Firefox added that panel, I always used this extension to determine fonts used in the selection:
https://addons.mozilla.org/firefox/addon/fontinfo/
And it seems there are many other font-inspector extensions to consider...
Chosen Solution
Firefox 24 ESR has the Fonts tab in the Inspector, so that shouldn't be a problem.