Onet Post Companion by Artllex

Onet Post Companion makes everyday use of Onet Mail in Firefox faster and more convenient.

Key features:
- navigate messages with ↑ / ↓,
- select and deselect messages with Space,
- extend a visual range with Shift + ↑ / ↓ without changing message checkboxes,
- select or deselect the entire active range with Space,
- toggle stars with S, including for multiple selected messages,
- quickly delete messages with Delete or Backspace,
- perform actions on multiple messages,
- multi-level Ctrl+Z / Ctrl+Y for deleting and moving messages,
- automatically remove Onet advertising messages sent from mailing_reklamowy@grupaonet.pl,
- support controls that appear only when the pointer hovers over them.

The extension works exclusively on Onet Mail pages and uses the user's current signed-in session. It does not send message content or user data to external services.

Independent project, not affiliated with Grupa Onet.