Sandboxie Support

Hello Stardance, Have you performed the steps outside Sandboxie? If not, please do that and then delete the contents of your sandbox to re-try. If the issue still persists, create a new Sandbox with default settings and let us know if the problem follows you there. If all fails, please create a new...

No readjustments necessary under several win10 operating systems. :/

:/
Unfortunately, none of these many options work under Win7 Home Premium - x64bit - Firefox Quantum 59.0.1(64-Bit)

browser.tabs.remote.autostart.2 is not listed under about:config