fix: error logging in firefox

[achingbrain]

Firefox has an error type with a .stack property that is an empty string, so guard on the various properties being empty before logging them.

Change checklist

• [x] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation if necessary (this includes comments as well)
• [ ] I have added tests that prove my fix is effective or that my feature works