Latest Firefox 95 Includes RLBox Sandboxing to Protect Browser from Malicious Code
Dec 07, 2021
 Mozilla is beginning to roll out Firefox 95 with a new sandboxing technology called RLBox that prevents untrusted code and other security vulnerabilities from causing "accidental defects as well as supply-chain attacks."  Dubbed " RLBox " and implemented in collaboration with researchers at the University of California San Diego and the University of Texas, the improved protection mechanism is designed to harden the web browser against potential weaknesses in off-the-shelf libraries used to render audio, video, fonts, images, and other content.   To that end, Mozilla is incorporating "fine-grained sandboxing" into five modules, including its  Graphite  font rendering engine,  Hunspell  spell checker,  Ogg  multimedia container format,  Expat  XML parser, and  Woff2  web font compression format.  The framework uses  WebAssembly , an open standard that defines a portable binary-code format for executable programs that can be run on m...