dieter.kaeppel

6 listings we've seen · as of 7 Oct 2026. This is the maker name shown on the store, not proof of who owns the company.

Accessibility

Persistent per-site volume control. Won't lag CPU or break fullscreen. Set custom audio levels for any domain automatically.

Tools

Detects and downloads videos and audio streams (including HLS/M3U8) directly to your download directory.

Tools

Ultimate widescreen stretch and smart zoom optimizer to remove black bars on YouTube videos.

Tools

Automates filling input fields and remembers your data.

Workflow & Planning

Automatically groups tabs.

Developer Tools

Privacy-first, ultra-lightweight API HTTP Header & Query parameter manipulator built on Manifest V3.