Issue on pages that have elements with ids that start with numbers

[espspinix]

On version 3.12 I cannot add markers on some pages. The error I see in the console is:
Uncaught DOMException: Failed to execute 'querySelectorAll' on 'Document': '#43ce' is not a valid selector. ( example page )

To me it seems that the error is here:

super-simple-highlighter/js/content_script/xpath.js

Line 55 in 33570dd

if (node.ownerDocument.querySelectorAll(`#${node.id}`).length === 1) {

As document.querySelectorAll has problems identifying ids that start with numbers.

A proposed fix from stackoverflow: https://stackoverflow.com/a/20306237/4489917