1DM Integration Module od Shawon2901

1DM Integration Module connects your Firefox browser to the 1DM (IDM+) download manager, automatically intercepting download links and handing them off to 1DM silently — no popups, no confirmation dialogs.
Features:
Auto-intercepts downloads based on file type or URL pattern
Sends downloads directly to 1DM via its built-in browser integration protocol
Context menu option to manually send any link to 1DM
Configurable file type filters via the popup
Minimal permissions footprint — only requests what it needs
Requirements:
1DM or 1DM+ must be installed on your device with browser integration enabled.
Designed primarily for Firefox on Android.

For testing use a gofile.io link which wouldn't work downloading with 1dm without this addon

For a new installation go to extension settings and set your Installed 1DM package name..

For firefox if you cancel that intent link once then you need to close and reopen the browser for the ui to appear again i think