devtools-source-map is maintained on GitHub at:

https://github.com/firefox-devtools/debugger.html/tree/master/packages/devtools-source-map

All the files in this folder are copied from the above repository and
should not be modified here.

For any issue or feature request on devtools-source-map, please log an issue at:

https://github.com/firefox-devtools/debugger.html/issues

and label it with "devtools-source-map".