The safety/stability issue comes from the fact that plug-ins (e.g., NPAPI) are native executables
Browsers started dropping support for plug-ins around 2015. However, plug-ins actually held on longer than you might think. Firefox didn't completely drop support for Flash until the beginning of this year
Browsers started dropping support for plug-ins around 2015. However, plug-ins actually held on longer than you might think. Firefox didn't completely drop support for Flash until the beginning of this year