Overview
Record approximate CPU usage and JS heap memory usage for the active tab.
TabPulse helps you monitor how much load a webpage is putting on your browser by recording approximate CPU activity and JavaScript heap memory usage for the currently active tab. It’s useful for troubleshooting slow sites, catching performance regressions, and understanding which pages are heavier during real browsing. ## Key features - Live recording for the active tab - Sampling interval control (250ms–2s) - CPU% (approximate) based on DevTools performance task time deltas - JS heap memory: heap used and heap total (MB) - Simple history view of recent samples in the popup ## How it works When you press Start, TabPulse temporarily attaches to the active tab using the Chrome DevTools Protocol (`chrome.debugger`) and periodically reads DevTools performance metrics. It then computes: - CPU% (approx.) from `TaskDuration` change over the selected interval - Heap used/total from `JSHeapUsedSize` and `JSHeapTotalSize` ## Notes & limitations - “CPU%” is an approximation, not an operating-system level per-process CPU meter. - TabPulse **cannot attach to internal browser pages like `chrome://` or other restricted URLs. - While recording, Chrome may indicate the tab is being debugged (this is required to access DevTools metrics). ## Privacy TabPulse does not collect or transmit your browsing data. - *No analytics* - *No remote servers* - *No selling/sharing of user data* Recorded samples are kept locally during the session for display in the popup. ## Permissions explanation - debugger: required to access DevTools performance metrics for the tab. - activeTab / tabs: required to identify and attach to the currently active tab. - storage: used to store recent samples locally during the session.
Details
- Version1.0.0
- Updated24 January 2026
- Offered byRahul Singh
- Size1.18MiB
- LanguagesEnglish (United Kingdom)
- Developer
Email
contact.rahul1991@gmail.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
