To use the view_gecko_profile tool:
cd testing/tools/view_gecko_profile
virtualenv venv
source venv/bin/activate
pip install -r requirements.txt
Then the command line:
python view_gecko_profile.py -b <path to browser binary> -p <path to gecko_profile.zip>
i.e. For Firefox:
python view_gecko_profile.py -b "/Users/rwood/mozilla-unified/obj-x86_64-apple-darwin17.4.0/dist/Nightly.app/Contents/MacOS/firefox" -p /Users/rwood/mozilla-unified/testing/mozharness/build/blobber_upload_dir/profile_damp.zip
i.e. For Chrome:
python view_gecko_profile.py -b "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome" -p /Users/rwood/mozilla-unified/testing/mozharness/build/blobber_upload_dir/profile_damp.zip