Current Firefox desktop builds support adding a custom search engine directly in Settings.

1. Open the Firefox menu and choose Settings.
2. Open Search.
3. Scroll to Search Shortcuts and click Add.
4. Use the Queye details below, then save.
5. Back near the top of the same page, set Default Search Engine to Queye.

Use these details

• Search engine name: Queye
• Keyword: queye
• URL with %s in place of the query: https://queye.co/search?s=%s

If you are on an older Firefox build and do not see the Add button in Search Shortcuts, update Firefox first.