Jonas Jenwald 7322a24ce4 Remove the FIREFOX build flag, since it's completely unused
After PR 9566, which removed all of the old Firefox extension code, the `FIREFOX` build flag is no longer used for anything.
It thus seems to me that it should be removed, for a couple of reasons:
 - It's simply dead code now, which only serves to add confusion when looking at the `PDFJSDev` calls.
 - It used to be that `MOZCENTRAL` and `FIREFOX` was *almost* always used together. However, ever since PR 9566 there's obviously been no effort put into keeping the `FIREFOX` build flags up to date.
 - In the event that a new, Webextension based, Firefox addon is created in the future you'd still need to audit all `MOZCENTRAL` (and possibly `CHROME`) build flags to see what'd make sense for the addon.
2020-01-21 00:06:15 +01:00
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2018-05-14 23:10:32 -04:00