Since about April 2023, I have been unable to edit css generated by SASS in Firefox’s DevTools Style Editor. If I click on a file listed by sourcemap, I receive the following error:
Error while fetching an original source: unsupported protocol for sourcemap request file:///home/.../sass/partials/_normalize.scss Source URL: file:///home/.../sass/partials/_normalize.scss
... replaces actual path redacted for security.
The sourcemap file is syntactically correct. It has the
/*# sourceMappingURL=<css_file_name>.css.map */ syntax. Working with webkit browsers such as Thorium, Chromium or Brave presents no error.
Through Google and DDG searches, all I have found on this topic is a similar unanswered post on superuser.com.
What is the extra step to accessing sourcemap files in Firefox DevTool Style Editor under Linux?