My desktop Mac suddenly (July 28) quit displaying page specified fonts, in some - not all - instances, using Inspector reveals affected sites defaulting to Helvetica Last… (read more)
My desktop Mac suddenly (July 28) quit displaying page specified fonts, in some - not all - instances, using Inspector reveals affected sites defaulting to Helvetica Last Resort, or failing to display Open Sans via gstatic.com. For comparison, my laptop - same FF v.78.12.0esr, using the same (advanced - default) fonts and colors settings - displays everything properly, as do those same sites on mobile. This is a local problem.
Those sites affected work fine using Chrome, Safari, which indicates system level fonts are loading properly.
Of the sites affected, one thing in common seems to be that they are WordPress/PHP dynamic sites.
I use FontExplorerX font management, which has been stable for years. There aren't any reported conflicts.
Application and system font caches have been flushed.
Firefox has been freshened.
I feel like this may be a corrupted prefs file somewhere, but have no idea how to proceed.
Attached images show different page display results using same search term in Google, DuckDuckGo, and two sites that are affected.