Scheduler Helper 1.0.6

The zip uploaded to the Chrome Web Store, built from this tag by this workflow. sha256 of the zip: 3c80d7c2696eb2b66de7a171f7318981084866706771ccb27f8eccf776abd32b. To check any copy (the store's included) against it: python tools/verify_extension.py --ref helper-v1.0.6