This line appears to be detected as a threat:
user_pref("extensions.Imagus.hz", "{\"deactivate\":1,\"actTrigger\":\"ctrl\",\"delay\":300,\"delayOnIdle\":true,\"zoomresized\":25,\"markOnHover\":\"dashed\",\"preload\":0,\"placement\":0,\"fullspace\":true,\"hiRes\":true,\"hiResOnFZ\":3,\"thumbAsBG\":false,\"thumbAsBGColor\":\"#c3c3c3\",\"thumbAsBGOpacity\":0.3,\"hideIdleCursor\":500,\"history\":true,\"mediaVolume\":40,\"scrollDelay\":0,\"pileWheel\":1,\"pileCycle\":false,\"capStyle\":0,\"capPos\":0,\"capWH\":false,\"capText\":true,\"capLinkText\":true,\"capNoSBar\":false,\"capFlashCount\":1,\"fzMode\":1,\"fzOnPress\":2,\"follow\":true,\"move\":true,\"waitHide\":false,\"minPopupDistance\":20,\"css\":\"margin: 3px 3px 20px; background: #f8f8ff padding-box; border: 3px solid hsla(0,0%,95%,.6); border-radius: 2px; box-shadow: 0 0 2px #666\",\"scOffInInput\":true,\"zoomFromFrame\":false,\"LDRsrc\":\"\",\"LDRcss\":\"\",\"LDRdelay\":300,\"LDRbgOpacity\":100,\"LDRanimate\":true,\"capWrapByDef\":false}");
Why is it a threat?