I am using brave. (which has a built in add blocker that might have caused problems)
The thing I remember for sure was that the secondary fire made sound when I first bought it and a few runs later I noticed it did not.
Other thing that may or may not (since I don't know what all had sound effects) are taking damage, primary fire and destroying enemies.
Viewing post in Second Chances jam comments
Thanks. We'll need to do some testing with it. We primarily use the Vivaldi browser, which also has a built in ad-blocker, plus have uBlock running, and have not noticed the issue yet. We did do most of our testing on Linux native, rather than in browser, so it may just need more time in the web version.