Reasons why illegal character prompts and garbled characters appear under Firefox_javascript skills

A display similar to this:

Copy code The code is as follows:

Error: illegal character source file ：file:///F:/MyDocument/jquery-126all.js Row: 1, Column: 4 Source code: 浵湩橩⡮笩⼊ਪ⨠樠畑牥⁹⸱⸲‶敎⁷慗敶䨠Crazy獡At this time, pay attention to the encoding of your .js file. The encoding may be inconsistent.