shared/docs/sourcemaps.md
To get sourcemaps to work in the production app, download the matching sourcemaps from the build folder. Run the following npm command, passing the path to the unzipped path:
yarn run inject-sourcemaps-prod -- /mysourcemaps/Keybase-1.0.7-20160111080008+1049d47.map
This will copy the sourcemaps into the application package (if installed in the default location). Otherwise you can do this yourself.
If you have a crash of a non-sourcemapped build (like a screenshot with a crash) you can do a post-mortem debug of the minimized code by using a utility.
yarn install -g sourcemap-finder
smfinder --position 1200:10 path-to-your-source-map