Update devtools-extensions build script to reflect changes in local b…#21004

Merged

bvaughn merged 3 commits intofacebook:masterfrom hecerinc:devtools-extensions-enable-local-build-scenario

Mar 15, 2021

+71-10

Commits on Mar 15, 2021

Update devtools-extensions build script to reflect changes in local build directory structure
hecerinc
committed
Fetch correct Firefox profile name based on WEB_EXT_FIREFOX env var
hecerinc
committed
Minor variable name nits
Brian Vaughn
committed