Browser Extension vs Hosted Alert Apps

Browser extensions and hosted alert apps can both help with marketplace alerts, but they have different tradeoffs.

Browser extensions

Browser extensions are useful when your workflow already lives on a desktop browser. They can watch pages, add interface helpers, or notify you while the browser is active.

They are less ideal when:

• your computer is asleep
• the browser is closed
• you want mobile push
• you monitor several platforms
• multiple people need to review alerts
• you do not want another extension installed

Extensions can also create privacy questions because they often need browser permissions.

Hosted alert apps

Hosted alert apps run outside your browser. You configure searches once, choose intervals and channels, and let the service check at the cadence you choose.

This works better when:

• you want alerts while away from your computer
• you use mobile push, Discord, Telegram, or Email
• you manage many searches
• you monitor several marketplaces
• you want search health visibility
• you want Custom URL mode for supported marketplace search pages
• you prefer not to install a browser extension

Privacy comparison

The key question is not just browser versus hosted. It is credentials and permissions.

Classifindr does not ask for marketplace login credentials. It also does not need a browser extension. Searches are configured in the web portal and alerts can reach the channels you choose.

Custom URL mode keeps that setup browser-free after the search is saved. Build a supported single-platform marketplace search in your browser, paste the search URL into Classifindr when the address carries the filters, then let Classifindr check it without keeping the tab open.

Reliability comparison

No approach can promise every marketplace listing. Extensions depend on browser conditions. Hosted alert apps depend on 1, 10, or 60 minute checks and marketplace availability. Both can be affected by platform changes.

The practical difference is workflow: a hosted alert app is better when you want checking to continue without keeping a tab open.

Which should you choose?

Use a browser extension if you work from one desktop and want local page monitoring. Use a hosted alert app if you want cross-device alerts, mobile push, team channels, and checking.

Classifindr is built for the hosted self-serve alert workflow, especially when you need Facebook Marketplace plus regional classifieds such as Gumtree, Craigslist, Trade Me, Kijiji, or OfferUp, with Custom URL mode available for supported single-platform search pages.