Feature Highlights

Peak performance table:
- Power
- Normalized Power
- Heart Rate
- Pace
- Grade Adjusted Pace
- VAM (climbing speed)
- Cadence
- Sea Power (potential power at sea level)
Dark Mode
- Only works on old school pages like Analysis
Export any activity to a FIT, TCX or GPX file
Create Live Segments for any effort (including downhills)
Running Power estimation
Analysis page stats are extended to include:
- Elapsed power average, normalized power, moving power average and watts/kg
- Grade adjusted pace
- TSS
- Intensity Factory
- VAM
- Elevation gain/loss
- Raw data and graph views
- Pw:Hr / Aerobic Decoupling
Weight and FTP overrides for all athletes
Inline comments system for activity page
Performance Predictor
Dashboard features
- Chronological ordering OPTION
- Hide virtual activities (except your own) OPTION
- Hide promotions and challenges OPTION
Responsive layout (mobile support for Firefox) OPTION
Detailed Running segments OPTION
W'balance graphing
Analysis graph smoothing

Disclaimer: I don't work for Strava nor have I interacted with any persons from Strava in the writing of this extension.