Update Firefox to the latest release | Firefox Help - Mozilla Support
https://support.mozilla.org/en-US/kb/update-firefox-latest-version
WEBUpdate Firefox. Click the menu button at the right side of the Firefox toolbar, go to Help, and select About Firefox.In the menu bar, open the Firefox menu and choose About Firefox. The About Mozilla FirefoxAbout Firefox window will open. Firefox will check for updates automatically. If an update is available, it will be downloaded.
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