WebCron

WebCron is a local-first scheduling extension for the open web.

It runs in Chrome and Firefox, and is designed around EventBridge-style scheduling concepts.

Why WebCron

• One-off and recurring schedules
• Rate and cron patterns
• Optional flexible execution window
• Grouped schedules for bulk operations
• Full target coverage:
  • open_url
  • crawl_range
  • webhook
  • multi_open
  • active_tab_actions
  • bookmark_folder
  • rss_feed
  • sitemap_crawl
  • api_fetch
  • file_download
  • search_query
  • form_submit
  • tab_audit
  • dom_watch
  • screenshot_capture
• Optional declarative browser actions (wait, click, input, scroll, extract)
• Run history and captured data views
• 100% local execution (no backend required)

Browser Support

• Chrome (Chromium-based browsers)
• Firefox

Local-First by Design

WebCron stores and executes everything client-side using browser extension APIs.

• Chrome: chrome.storage, chrome.alarms, chrome.tabs, chrome.scripting
• Firefox: browser.* compatible APIs via WebExtension support

Documentation

• Development and local loading: docs/DEVELOPMENT.md
• Publishing and release automation: docs/PUBLISHING.md
• Scheduling and action JSON notes: docs/REFERENCE.md
• Privacy policy: PRIVACY.md