https://connect.mozilla.org/t5/discussions/improve-silverbench-performance/m-p/132804#M53254 <P>When running SilverBench (<A href="https://silver.urih.com" target="_blank" rel="noopener">https://silver.urih.com</A>), Firefox performs orders of magnitude worse than Chrome, and ramps up the CPU to where the fans start screaming, yet still underperforms, whereas Chrome doesn't drive the CPU nearly as hard. Is this something that can be looked at?</P> <P>This performance gap is also noticeable when playing YouTube videos - Chrome runs them easily, while Firefox tends to overheat my laptop while ramping up the fans.</P> <P>SilverBench performance comparisons below.</P> <P>Dell M18, 16GB memory, WIndows 11 25H2</P> <UL> <LI>Chrome: P84090</LI> <LI>Firefox:&nbsp; &nbsp;P750</LI> </UL> <P>Mac Mini M4, 8GB memory, Macos 26.5.2</P> <UL> <LI>Chrome 150.0.7871.186: P56323</LI> <LI>Firefox 153.0:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; P1430</LI> </UL> <P>I've been a Mozilla browser user since the first versions on Windows NT 3.1, and run Firefox on Windows, Mac, and Linux. I only use Chrome as a backup for sites that Firefox won't run properly, or when Firefox underperforms.</P> Sun, 26 Jul 2026 20:33:51 GMT dthittner 2026-07-26T20:33:51Z https://connect.mozilla.org/t5/discussions/improve-silverbench-performance/m-p/132804#M53254 <P>When running SilverBench (<A href="https://silver.urih.com" target="_blank" rel="noopener">https://silver.urih.com</A>), Firefox performs orders of magnitude worse than Chrome, and ramps up the CPU to where the fans start screaming, yet still underperforms, whereas Chrome doesn't drive the CPU nearly as hard. Is this something that can be looked at?</P> <P>This performance gap is also noticeable when playing YouTube videos - Chrome runs them easily, while Firefox tends to overheat my laptop while ramping up the fans.</P> <P>SilverBench performance comparisons below.</P> <P>Dell M18, 16GB memory, WIndows 11 25H2</P> <UL> <LI>Chrome: P84090</LI> <LI>Firefox:&nbsp; &nbsp;P750</LI> </UL> <P>Mac Mini M4, 8GB memory, Macos 26.5.2</P> <UL> <LI>Chrome 150.0.7871.186: P56323</LI> <LI>Firefox 153.0:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; P1430</LI> </UL> <P>I've been a Mozilla browser user since the first versions on Windows NT 3.1, and run Firefox on Windows, Mac, and Linux. I only use Chrome as a backup for sites that Firefox won't run properly, or when Firefox underperforms.</P> Sun, 26 Jul 2026 20:33:51 GMT https://connect.mozilla.org/t5/discussions/improve-silverbench-performance/m-p/132804#M53254 dthittner 2026-07-26T20:33:51Z https://connect.mozilla.org/t5/discussions/improve-silverbench-performance/m-p/132835#M53260 <DIV class=""><DIV class=""><DIV class=""><DIV class=""><DIV class=""><DIV class=""><DIV class=""><DIV class=""><P class="">SilverBench isn't a reliable real-world browser benchmark, so large score differences may reflect how each browser optimizes that specific workload rather than overall performance. If you're also seeing high CPU usage on YouTube it,s worth checking that Firefox is using hardware video acceleration and updating your graphics drivers, since disabled or unsupported hardware decoding can significantly increase CPU load.</P></DIV></DIV></DIV></DIV></DIV></DIV></DIV></DIV> Mon, 27 Jul 2026 02:24:16 GMT https://connect.mozilla.org/t5/discussions/improve-silverbench-performance/m-p/132835#M53260 lezavel 2026-07-27T02:24:16Z