If you scroll down to the 'Extensions' section, one of the extensions you will find is 'Multi-process staged rollout'. If you key in about:support in the address bar, the support page, labeled 'Troubleshooting Information', is displayed. You'll need to restart Firefox for the new setting to take effect.ġ I expect the large majority of /r/firefox users have at least one addon. The value that's been tested on the prerelease audience and is rolling out to other users is 4. If you don't have multi-e10s and would like it, go to about:config in your URL bar, search for, and double click it to enter a new value. This audience will be expanded, but for now the official line is something like: 'We will be monitoring results with the intent of increasing the audience if results are good.' Eligible users are users who have multiprocess already and who have no addons enabled. Initially 80% of eligible users will receive multi-e10s. However, Mozilla is rolling this out incrementally - to make sure nothing blows up. This can improve responsiveness and stability (yay!). You may have seen that Firefox 54 is getting 'multi-e10s.' This is multiprocess, but instead of just using one process for content (tabs), it's using multiple processes (4 for now). In fact, if you're reading this you probably won't for now.

Fireshot incompatible with firefox 54.0