Chrome extensions only run when the tab is open and the browser is focused. The RedditMaster Agent is a background desktop process — it keeps working when you close your laptop, when you walk away, when you sleep. Here's the full comparison.
Six axes that decide whether an automation survives on Reddit for weeks without a flag.
Chrome extensions can only run inside a live browser tab. The moment you close the tab, switch the browser to power-save, or shut your laptop, the extension's background scripts are paused or killed. The RedditMaster Agent is a separate OS process — it lives in your menu bar / system tray, keeps its own Chromium session, and keeps working for days without anyone touching the keyboard.
Reddit can — and does — read which extensions are injecting into the page. Even a perfectly-behaved extension still announces itself in subtle ways: DOM mutation patterns, content-script injection timing, manifest-loaded resources. The Agent doesn't inject anything; it drives the page from outside the renderer via the DevTools protocol, with the same humanised typing and dwell as a real user.
When Reddit ships a UI change — moved button, renamed class, new DOM tree — a browser extension has to be patched and re-released through the Chrome Web Store review queue (days). The Agent's selectors are hot-swappable: RedditMaster's backend pushes a config update, the Agent picks it up on the next heartbeat, and your automation keeps running. No reinstall, no wait.
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