z3rco — BlogJunior security researcher and source code auditor. I read code to find the bugs scanners miss — IDOR, CSRF, auth bypasses, GraphQL exploits.https://z3rco.meenI Bypassed Firefox's Battery API Block Using CPU Timinghttps://z3rco.me/blog/firefox-battery-api-bypasshttps://z3rco.me/blog/firefox-battery-api-bypassFirefox removed the Battery API for privacy. I found a way to infer battery state anyway — using nothing but JavaScript timing measurements.Sun, 05 Apr 2026 00:00:00 GMTresearchside-channelfirefoxprivacyfingerprintingz3r0.dayz0101@gmail.com (z3rco)