Fix #930 - Disable extension in incognito mode

package.json

@@ -9,8 +9,8 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "ajv": "^6.6.2",
     "addons-linter": "^1.3.2",
+    "ajv": "^6.6.2",
     "chai": "^4.1.2",
     "eslint": "^3.17.1",
     "eslint-plugin-no-unsanitized": "^2.0.0",
@@ -25,7 +25,7 @@
     "stylelint": "^7.9.0",
     "stylelint-config-standard": "^16.0.0",
     "stylelint-order": "^0.3.0",
-    "web-ext": "^2.2.2"
+    "web-ext": "^2.9.3"
   },
   "homepage": "https://github.com/mozilla/multi-account-containers#readme",
   "license": "MPL-2.0",