### Steps to reproduce 1. Close all tabs and force stop the app. 2. Open a new tab to play a video in Youtube. (I used https://m.youtube.com/watch?v=-ZeAr9ROO8w for my tests.) 4. After 30 seconds, press the "home" button and turn off the screen. 5. Check the memory usage again at various points via adb using "adb shell dumpsys meminfo". ### Expected behavior Total memory usage by Firefox processes would be lower and closer to total memory usage by Chrome processes. ### Actual behavior Firefox (org.mozilla.firefox package) uses 6 total processes when playing video: the main process, the gpu process, two "tab" processes (one of which is the content process and the other of which is the extension process), a utility process and a media process. I ran this test twice for Firefox and got pretty consistent results. Here are the averages across those runs, per-process: ``` RSS: 362,288K: org.mozilla.firefox (pid 20003 / activities) 268,488K: org.mozilla.firefox:tab34 [content process] 227,292K: org.mozilla.firefox:gpu 171,296K: org.mozilla.firefox:tab15 [extension process] 129,848K: org.mozilla.firefox:utility 118,104K: org.mozilla.firefox:media ---------- 1,277,316K PSS: 175,526K: org.mozilla.firefox 122,289K: org.mozilla.firefox:tab34 [content process] 94,418K: org.mozilla.firefox:gpu 38,464K: org.mozilla.firefox:tab15 [extension process] 18,605K: org.mozilla.firefox:utility 12,399K: org.mozilla.firefox:media ---------- 461,701K ``` Chrome (com.android.chrome) uses 3 total processes when playing this same video: the main process, a gpu process and a content process. I ran this test three times for Chrome and got pretty consistent results as well. Here are the averages across those runs, per-process: ``` RSS: 315,715K: com.android.chrome 216,016K: com.android.chrome:privileged_process0 218,372K: com.android.chrome:sandboxed_process0:org.chromium.content.app.SandboxedProcessService0:1 -------- 750,101K PSS: 152,613K: com.android.chrome (pid 20018 / activities) 82,015K: com.android.chrome:privileged_process0 (pid 20104) 106,553K: com.android.chrome:sandboxed_process0:org.chromium.content.app.SandboxedProcessService0:1 (pid 20189) -------- 341,181K ``` According to these numbers, Firefox is using about 70% more memory according to RSS accounting and 35% more memory according to PSS accounting when playing this video. ### Device information * Firefox version: 127.0.1 * Android device model: Pixel 6 * Android OS version: 14 ### Any additional information? I'm not sure how important is was but, prior to running tests in a given browser, I closed all tabs in that browser, cleared the cache for that browser and restarted my device.
Bug 1905246 Comment 0 Edit History
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### Steps to reproduce 1. Close all tabs and force stop the app. 2. Open a new tab to play a video in Youtube. (I used https://m.youtube.com/watch?v=-ZeAr9ROO8w for my tests.) 4. After 30 seconds, press the "home" button and turn off the screen. 5. Check the memory usage again at various points via adb using "adb shell dumpsys meminfo". ### Expected behavior Total memory usage by Firefox processes would be lower and closer to total memory usage by Chrome processes. ### Actual behavior Firefox (org.mozilla.firefox package) uses 6 total processes when playing video: the main process, the gpu process, two "tab" processes (one of which is the content process and the other of which is the extension process), a utility process and a media process. I ran this test twice for Firefox and got pretty consistent results. Here are the averages across those runs, per-process: ``` RSS: 362,288K: org.mozilla.firefox (pid 20003 / activities) 268,488K: org.mozilla.firefox:tab34 [content process] 227,292K: org.mozilla.firefox:gpu 171,296K: org.mozilla.firefox:tab15 [extension process] 129,848K: org.mozilla.firefox:utility 118,104K: org.mozilla.firefox:media ---------- 1,277,316K PSS: 175,526K: org.mozilla.firefox 122,289K: org.mozilla.firefox:tab34 [content process] 94,418K: org.mozilla.firefox:gpu 38,464K: org.mozilla.firefox:tab15 [extension process] 18,605K: org.mozilla.firefox:utility 12,399K: org.mozilla.firefox:media ---------- 461,701K ``` Chrome (com.android.chrome) uses 3 total processes when playing this same video: the main process, a gpu process and a content process. I ran this test three times for Chrome and got pretty consistent results as well. Here are the averages across those runs, per-process: ``` RSS: 315,715K: com.android.chrome 216,016K: com.android.chrome:privileged_process0 218,372K: com.android.chrome:sandboxed_process0:org.chromium.content.app.SandboxedProcessService0:1 -------- 750,101K PSS: 152,613K: com.android.chrome (pid 20018 / activities) 82,015K: com.android.chrome:privileged_process0 (pid 20104) 106,553K: com.android.chrome:sandboxed_process0:org.chromium.content.app.SandboxedProcessService0:1 (pid 20189) -------- 341,181K ``` According to these numbers, Firefox is using about 70% more memory according to RSS accounting and 35% more memory according to PSS accounting when in the background after playing this video. ### Device information * Firefox version: 127.0.1 * Android device model: Pixel 6 * Android OS version: 14 ### Any additional information? I'm not sure how important is was but, prior to running tests in a given browser, I closed all tabs in that browser, cleared the cache for that browser and restarted my device.