Domain File Downloader by takoyaki

For download pages, archives and similar pages where you want to open only the links that point to certain domains — without clicking them one by one.

■ How it works
1. Register a "target domain" in the settings (e.g. files.example.com)
2. Open a page full of links and click the toolbar button
3. Every link to a target domain opens in a background tab right next to the current one, in page order
Download links are saved through Firefox's normal download flow (with the file name the server provides)

■ Features
- Target domains match their subdomains too (registering example.com also covers files.example.com)
- Links to "excluded domains" are never opened, even if they match a target
- Duplicate links are opened only once
- Tabs open one after another, 0.5 s apart; pressing the button again mid-run won't open anything twice
- The button badge shows how many tabs were opened

■ Easy to manage
- Add or remove domains one at a time in the settings; changes are saved immediately, and removals can be undone
- Paste several domains or URLs at once (www. and port numbers are stripped automatically)
- Right-click a link → "Add the link's domain as a target / Exclude the link's domain"
- Right-click the toolbar button → "Add this site as a target / Exclude this site", "⚙ Settings"

■ Privacy
No browsing history or page content is collected or transmitted. Your domain lists are stored only in your browser. Links are read only from the tab where you click the toolbar button.

■ Notes
- If a link points to something the browser can display (PDF, image, HTML…), it opens in a tab instead of downloading
- On pages with many matching links, that many tabs will open
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