@gosinya Electrolysis, Firefox's multi-process design, is the essential for Firefox's sandboxing highlight as it utilizes kid procedures to set up security limits.
Rather than executing all code in the parent procedure, code is executed in a substance procedure rather constraining what it can do.
Firefox's sandboxing model backings distinctive dimensions which figure out what code executed in the sandbox is permitted to do.
Mozilla executed three dimensions as of now, and plans to include extra dimensions with higher security confinements later on.
The working framework and the Firefox channel depend what is actualized as of now. Here is a short diagram of the present status:
All: Gecko Media Plugin empowered.
Windows: NPAPI module empowered, content at level 2 in Nightly, at level 1 for different channels, printer at level 0.
OSX: content at level 2 in Nightly, at level 1 in Aurora, rest nothing.
Linux: content at level 2 in Nightly, rest nothing
The following focus for Windows is level 3 sandboxing, for OSX level 2 sandboxing, and for Linux level 1 sandboxing.