Reviving the 1973 Unix Programmer's Manual
The 1973 Fourth Edition of the Unix Programmer's Manual doesn't seem to be available online in typeset form. This is how I managed to recreate it from its source code.
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How I Recovered my Firefox Tab Groups
When quit and restarted Firefox today I received an unwelcomed shock. All my tab groups, which I maintained using the Tab Groups by Quicksaver plugin, were gone! This happened because it upgraded to Firefox Quantum (57), whose API does not maintain backward compatibility with the one used by the plugin. Although I knew the plugin would one day stop working, I thought there would be some last-minute warning and chance to export the tab groups.
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