teleclimber, I made a contribution to browserslist:
https://github.com/browserslist/browserslist/pull/819
I have been trying to get the Lume static site generator to run inside a #Dropserver sandbox, but I have been running into all kinds of issues: some modules written for #NodeJS assume they have read permissions for the entire disk, and error out when you run them with restrictive permissions. Any project that uses #PostCSS + #autoprefixer (ie most build systems) will hit this.
https://github.com/browserslist/browserslist/issues/813
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