Hi , I got a virus called url:mal in my pc & it is posing as an addon in firefox as Site Navigation 0.9.1, I got the free version of Avast & got the Anti malware bytes pro & Avast seems to be detecting it but cannot remove it , I've run a scan with Malwarebytes but no luck & I've also tried adwarecleaner, rkill & combofix but it still there , I've even tried to remove it from firefox manually , tried disabling it & even tried resetting the firefox but it keeps coming back after I reopen the browser