Highlighting text does not work

[Zeroji]

• [ ] I have checked the latest main branch to see if this has already been fixed
• [x] I have searched existing issues and pull requests for duplicates

URL to the section(s) of the book with this problem: https://rust-book.cs.brown.edu/ (first highlight test)

Description of the problem: Highlighting doesn't work

Whenever I press "Submit" in the highlight input box, with or without having entered text, nothing happens (box doesn't even close) and the following appears in my console:

Obfuscated JS probably isn't that useful, but here is where my debugger thinks the issue is:

System details: OS: Linux Mint XFCE 21.1 Browser: Firefox 108.0.2

Let me know if more information is required :)

[Zeroji]

Looks like it's fixed... no new commits, and I don't think I've restarted my browser. Sorry for the noise!

[vipulrawat]

It (still) happen if you triple-click to select the entire paragraph