Minimal Firefox WebExtension that exports browser history to history-export.json with this schema per entry:

• id
• time
• url
• title
• type
• parent

• manifest.json
• popup.html
• popup.js

1. Open about:debugging#/runtime/this-firefox.
2. Click Load Temporary Add-on....
3. Select the manifest.json file in this folder.

1. Click the extension button in the Firefox toolbar.
2. Click Download History JSON in the popup.
3. Choose a location to save history-export.json when Firefox prompts.

• This uses the WebExtension history and downloads permissions.
• parent is inferred as the most recent previous entry with the same domain.