fixed: e.matches: null check

[ncaq]

My Firefox verbose error is

JavaScript error: moz-extension://c04083df-5b98-4196-b0f9-c185ea86eef1/content_scripts/modules.min.js, line 1: TypeError: e.matches is not a function

So, I add null check for e.matches.

[brookhong]

Thanks, but the error seems not to be caused by null element, as if e is null, it will raise error as below

TypeError: e is null

The cause seems to be that a non-element object was passed in, could you please provide a detail steps to reproduce your issue?

[ncaq]

but the error seems not to be caused by null elemen

I'm sorry, it was a mistake.

could you please provide a detail steps to reproduce your issue?

This happens only when you open some pages.
This may not be a configuration problem, since it occurs even in the default settings of surfingkeys.
The location of the error log is .xsession-errors.