Version 1.0.1 — First release
Performance Manager for Firefox 1.0.1 is the first release of the extension. It automatically unloads eligible inactive tabs to help keep Firefox responsive and reduce memory pressure during everyday browsing.

Automatic sleeping of inactive tabs after a configurable timeout
Individual inactivity tracking for each tab instead of one global timer
Smart Memory Modes: Balanced, Aggressive, Maximum Savings and Custom
Maximum Awake Tabs to control how many tabs remain loaded
Protected tabs for active, pinned, audible, loading and private tabs
Per-site rules with custom sleep time or Always Awake protection
Quick actions to sleep selected percentages of eligible inactive tabs or free memory immediately
Tab Performance Manager with live tab state and manual sleep controls
Activity Log showing sleeping, restored, skipped and cleanup events
Persistent local settings and activity history stored in Firefox
Toolbar badge showing the number of sleeping tabs
No analytics, telemetry, tracking, advertising or external servers
No hard Firefox RAM limit is claimed; the extension reduces resource usage by unloading eligible inactive tab content