Quote
rodocop
Was found that this page stops working when both disk and memory caches are set to off.
Check whether it refers to you...
Thanks, rodocop; yes, it does! I always disable disk caching, but leave memory caching enabled. When I checked about:config just now, however, I found that offline caching had been inadvertently disabled. Re-enabling it solved the problem. I guess it makes sense, since about:preferences is basically an internal function that doesn't use an online source.
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Gerry