Legacy extensions prevent multiprocess support, which causes Firefox to be sluggish and laggy.
If you disable the extension you installed, you'll probably see a big difference in Firefox performance.
This is why they're disabling those extensions.
If you disable the extension you installed, you'll probably see a big difference in Firefox performance.
This is why they're disabling those extensions.
I would recommend using adblock plus instead, as it is many leagues faster than UBlock Origin in Firefox since version 48 I believe (They optimized their code with Mozilla a couple months ago). Just make sure you go into the adblock plus filter preferences and uncheck "Allow some non-intrusive advertising" problem solved.