Automation doesn't have one correct home. The same task — say, monitoring something and taking action — can live in a browser extension or a standalone desktop app, and picking the wrong one creates friction that shows up months later.
When a browser extension is right
If the task is tied to a specific webpage — reading page content, filling a form, watching for a DOM change — an extension is the natural home. It has direct access to the page context that a desktop app would have to simulate or scrape around.
When a desktop bot is right
Anything that needs to run continuously in the background, independent of whether a browser tab is open, belongs on the desktop. Scheduled publishing, file monitoring, and long-running queues all fit this better — a browser extension dies the moment the tab closes.
Permissions are a real cost, not a footnote
Browser extensions with broad page-access permissions are a real trust decision, both for you and for anyone using a tool you build. Desktop apps face a similar tradeoff with system-level permissions. Neither is automatically safer — it depends on scope.
Platform policy compliance
Extensions that automate interaction with a social platform's own interface — auto-clicking, auto-posting through DOM manipulation — frequently cross into territory that violates that platform's terms of service. A manual-assist tool that prepares content for a human to post is a meaningfully different, and safer, design than one that clicks the post button itself.
A simple decision test
Ask: does this need to keep running when no browser tab is open? If yes, desktop. Does it need direct access to a specific page's content? If yes, extension. Most tasks answer this question clearly once it's asked directly.
The right automation layer isn't a technology preference. It's wherever the task actually lives.