Problem
Recently, after updating html,css,javascript, the following Content rendering error occurs

Solution
Delete the corresponding files in the following resource folder
JavaScript.docset\Contents\Resources\Documents\developer.mozilla.org\static\build\js\react-main.e49be9481ede.jsCSS.docset\Contents\Resources\Documents\developer.mozilla.org\static\build\js\react-main.e49be9481ede.jsHTML.docset\Contents\Resources\Documents\developer.mozilla.org\static\build\js\react-main.e49be9481ede.js
js file named similarly to react-main.<hashcode>.js
Take the css docs fix as an example
Edit --> Preferences

Delete the files in the corresponding folder

ok