| **[`DisableFormHistory`](#disableformhistory)** | Turn off saving information on web forms and the search bar.
| **[`DisableMasterPasswordCreation`](#disablemasterpasswordcreation)** | Remove the master password functionality.
| **[`DisablePasswordReveal`](#disablepasswordreveal)** | Do not allow passwords to be revealed in saved logins.
-| **[`DisablePocket`](#disablepocket)** | Remove Pocket in the Firefox UI.
+| **[`DisablePocket`](#disablepocket-deprecated)** | Remove Pocket in the Firefox UI.
| **[`DisablePrivateBrowsing`](#disableprivatebrowsing)** | Remove access to private browsing.
| **[`DisableProfileImport`](#disableprofileimport)** | Disables the "Import data from another browser" option in the bookmarks window.
| **[`DisableProfileRefresh`](#disableprofilerefresh)** | Disable the Refresh Firefox button on about:support and support.mozilla.org
}
```
### DisableBuiltinPDFViewer
+
Disable the built in PDF viewer. PDF files are downloaded and sent externally.
+Note: As of Firefox 140, this policy no longer completely disables PDF.js; it changes the handler to send PDF files to the operating system. Embedded PDF files are shown in the browser. If you need to completely disable PDF.js, you can use the [`PDFjs`](#pdfjs) policy.
+
**Compatibility:** Firefox 60, Firefox ESR 60\
**CCK2 Equivalent:** `disablePDFjs`\
-**Preferences Affected:** `pdfjs.disabled`
+**Preferences Affected:** N/A
#### Windows (GPO)
```
}
}
```
-### DisablePocket
+### DisablePocket (Deprecated)
+
Remove Pocket in the Firefox UI. It does not remove it from the new tab page.
**Compatibility:** Firefox 60, Firefox ESR 60\