Yes, provided your legacy Firefox version supports the website’s TLS configuration. Many modern HTTPS sites will fail due to outdated cipher suites.
| Error Message | Solution | |---------------|----------| | “This add-on could not be installed because it appears to be corrupt” | Re-download the .xpi file; the file may be incomplete. | | “Not compatible with Firefox 57+” | You are using a modern Firefox. Downgrade to Firefox 56 or use an ESR version. | | “Tamper Data does not appear in the menu” | Disable other extensions that may conflict, or reset toolbars to default. | tamper data 11.0.1 download
No. Tamper Data was built exclusively for Firefox’s legacy XUL framework. For Chrome, use (discontinued) or Requestly . Yes, provided your legacy Firefox version supports the