Firefox nightly builds add page lockdown mode

В nightly builds Firefox, which will form the basis of the release of Firefox 70, added support for page lockdown mode, developed under the codename Fission. When the new mode is activated, the pages of different sites will always be placed in the memory of different processes, each of which uses its own sandbox. At the same time, division by processes will be carried out not by tabs, but by domains, which will further isolate the contents of external scripts and iframe blocks. To enable lockdown mode, start firefox with the "--enable-fission" option or set the "fission.autostart=true" variable in about:config.

Also in Firefox 70 noted transition to use updated logo and changing the name from Firefox Quantum to Firefox Browser.

Source: opennet.ru