# SuperchargePerformance 1.2.1 — Rebrand, Refreshed Blocklists & Stability Fixes

> The extension is now SuperchargePerformance — renamed to sit clearly alongside SuperchargeNavigation. All blocklist sources are freshly compiled: 186K+ declarativeNetRequest rules across three tiers. Frozen tab detection, Safe Mode reliability, and fresh-install blocking all got fixes. The whitelist toggle now reads the correct state when you reopen the popup.


- Canonical: https://www.superchargebrowser.com/changelog/performance/1.2.1/
- Extension: performance
- Version: 1.2.1
- Released: 2026-03-12
- Chrome Web Store: https://chromewebstore.google.com/detail/tab-suspender-memory-save/pafkkbjmpnfkdkkhldbbnggnmpbbhkmf
- Microsoft Edge Add-ons: https://microsoftedge.microsoft.com/addons/detail/superchargeperformance-t/heappihlcojbpofeigdcggabhblmdjol
- Source: SuperchargeBrowser (https://www.superchargebrowser.com)

## Highlights

- Rebranded from SuperchargeBrowser to SuperchargePerformance
- Refreshed blocklist sources with 186K+ declarativeNetRequest rules
- Amber brand system with new icons throughout
- 10+ stability and compatibility fixes

## Rebrand to SuperchargePerformance

The extension has been renamed from "SuperchargeBrowser" to "SuperchargePerformance" to clearly distinguish it from SuperchargeNavigation — our new vertical tabs and workspaces extension. All in-extension UI, CWS listings, and localized descriptions have been updated across all 27 supported languages.

## Refreshed Blocklist Sources

The entire blocklist stack has been refreshed with the latest upstream sources. The new compilation produces 186K+ declarativeNetRequest rules across three tiers (Free, Medium, and PRO), with stale chunks automatically cleaned before recompilation.

## Stability & Compatibility Fixes

- **Frozen tab handling:** Tabs in Chrome's frozen state (Chrome 132+) are now correctly skipped during suspension checks
- **Safe Mode reliability:** Fixed DNR session rule cleanup, pushState navigation guard, and toast theme support
- **Prioritizer performance:** Deferred IntersectionObserver initialization until after first layout pass to avoid blank-page race conditions
- **Fresh install blocking:** Resolved an issue where content blocking rules weren't applied on first install
- **Dashboard accuracy:** Improved RAM calculation methodology and metrics flush timing
- **Site toggle:** Fixed popup whitelist toggle not reflecting the correct state on reopen
- **CWS listing optimization:** Updated titles and descriptions across 27 locales with improved keyword targeting

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Canonical URL: https://www.superchargebrowser.com/changelog/performance/1.2.1/