Make privacy policy text consistent

Author: filips123

extension/src/_locales/en/messages.json

@@ -239,7 +239,7 @@
     "description": "The notice for downloaded Firefox on the setup page"
   },
   "setupPageLicensePrivacyPolicy": {
-    "message": "This extension exchanges personal data (current website and manifest URLs, as well as other PWA details) with the native program when the user initiates the PWA installation. This is necessary in order to correctly obtain and parse the Web Application Manifest and install the PWA. Data are stored on the computer as long as that PWA is installed. No personal data leave the computer or are sent to third parties.",
+    "message": "The extension exchanges personal data (current website and manifest URLs, as well as other PWA details) with the native program when the user initiates the web app installation. This is necessary in order to correctly obtain and parse the Web Application Manifest and install the web app. Data are stored on the computer as long as that web app is installed. No personal data leave the computer or are sent to third parties.",
     "description": "The privacy policy notice on the setup page"
   },
   "setupPageLicenseLinks": {