Quote:

The Firefox 68.0 distribution starts on July 9, 2019. Most Firefox installations are configured to run automatic checks for updates to install new browser versions once they are picked up.

Firefox users may run manual update checks by selecting Menu > Help > About Firefox to install the updates sooner.

Direct downloads are also provided by Mozilla. Note that the downloads are made available at one point on July 9, 2019 and that they may not be available right after this release guide has been published.