> By that definition Chrome is the only browser that sandboxes. I believe most Chromium based browsers could also fall under that category although I admit tha

> By that definition Chrome is the only browser that sandboxes. I believe most Chromium based browsers could also fall under that category although I admit that's just being pedantic. Furthermore at least Edge and to the lesser extent IE(11) do have some sandboxing which purpose is to enhance security. Their (renderer) processes do run at a low integrity level and are ran within an Appcontainer. On IE11 this is enabled through the use of Enhanced protected mode with 64-bit processes. This allows it to use AppContainers even with the desktop browser. Edge always uses AppContainers AFAIK. I'm not sure it's sandboxed to the same extent as Chrome but it is a level of defense in depth. Edge also uses some security mitigations that Chrome does not such as CFG (control flow guard) although that's not dependent on a sandbox so CFG, baring performance issues, could be used in any browser sandboxed or not.