Chrome //
Extensions 
Chrome
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Performance-Analyser
Get insight into the performance of the website in the current tab - sort of a mini live version of WebPageTest
CrOSPerf - Chrome OS Performance
簡易CPUモニタ
Display to several useful OS-Performance info.
(cog's code based CPU Monitor.)
UXM - Web Performance Monitor (22q3)
Installed by your IT Organization via UXM Desktop agent, monitors performance for selected websites, see options for urls monitored.
Hide Latest Video Performance - YT
Hides the 'Latest video performance' widget within the YouTube Studio dashboard.
CPU and Memory Performance Monitor
Monitor Memory, CPU utilization & CPU Temp (Chome OS). Clean up memory by dicardings tabs. Clear browsing data.
performance-HTML
This extensions displays some technical and structural performance data of websites.
Keyword Performance Analyzer
Analyze the 'key'words of your current marketing campaigns to easily separate the top performers from the non-performers.
Simple Performance Bar
Simple site performance bar that presents network, server, client and pageload times
Perforator - Ember Performance Extension
Ember.js app performance tool. See on page, console, and devtools timeline where performance bottlenecks are. Developed by LinkedIn.
Performance Toolkit
Performance Toolkit for Chrome Devtools. A visualization of the performance timing.