Firefox warning: InstallTrigger is deprecated and will be removed in the future

[RichardD2]

In Firefox 102, I see a warning logged to the console on the project home page:

InstallTrigger is deprecated and will be removed in the future.
favico.min.js:7:819

It seems this has been deprecated since Firefox v100:
1754441 - Deprecate InstallTrigger

As far as I can see, this is only used for browser detection:

_browser.ff = typeof InstallTrigger != 'undefined';

[waqast]

changing line with this will resolve the issue;

_browser.ff = navigator.userAgent.toLowerCase().includes('firefox');