This quiz access rule was created by Tim Hunt at the Open University.
If you install this plugin, there is a new option 'Allowed browser exam keys' on the quiz settings form where you can enter valid keys for version of SEB that should be allowed to attempt the quiz. There is also a new capability 'Not required to use Safe Exam Browser'. Users with that capability (by default teachers and above) are exempt from the secure browser check.
To install using git, type this command in the root of your Moodle install
git clone git://github.com/lucaboesch/moodle-quizaccess_safeexambrowser.git mod/quiz/accessrule/safeexambrowser echo '/mod/quiz/accessrule/safeexambrowser/' >> .git/info/exclude
Alternatively, download the zip from https://github.com/lucaboesch/moodle-quizaccess_safeexambrowser/zipball/master unzip it into the mod/quiz/accessrule folder, and then rename the new folder to safeexambrowser.
Once installed you need to go to the Site administration -> Notifications page to let the plugin install itself.
Note this plugin is not needed from Moodle 3.9 onwards. Its function is embedded in the default quizaccess_seb access rule. Version 20200727 is the final release.