FreshRSS Peek от Mike Maurizi Jr

FreshRSS Peek lets you check your unread articles from a FreshRSS instance directly in a toolbar popup — no need to open a new tab.

Features:
- Inline popup showing unread articles with expandable content
- Click article titles to open and automatically mark as read
- Toggle read/unread state per article
- Badge count showing unread articles
- Adapts to your Firefox light/dark theme
- Configurable auto-refresh interval
- Optional sidebar support

Requires a FreshRSS instance with the Google Reader API enabled.