You're probably still seeing the value `false` because local builds are branded as similar-to-nightly (so `IS_NOT_EARLY_BETA_OR_EARLIER` still gives you a `false` value as in comment 20). Your two easiest options to enable the feature in that local build would be: (1) Just change `value: false` to `value: true` in the first snippet that you quoted in comment 21 (no need for the ifdefs or `IS_NOT_EARLY_BETA_OR_EARLIER` variable). (2) Or you can just do a build of the unmodified source code, and then visit `about:config` and search for this preference name there, and toggle its value to `true`.
Bug 1913403 Comment 22 Edit History
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You're probably still seeing the value `false` because local builds are branded as similar-to-nightly (so `IS_NOT_EARLY_BETA_OR_EARLIER` still gives you a `false` value as in comment 20). Your two easiest options to enable the feature in that local build would be: (1) Just change `value: false` to `value: true` in the first snippet that you quoted in comment 21 (no need for the ifdefs or `IS_NOT_EARLY_BETA_OR_EARLIER` variable). (2) Or you can just do a build of the unmodified source code, and then after you launch Firefox on your actual phone, visit `about:config` and search for this preference name there, and toggle its value to `true`.
You're probably still seeing the value `false` because local builds are branded as similar-to-nightly (so `IS_NOT_EARLY_BETA_OR_EARLIER` still gives you a `false` value as in comment 20). Your two easiest options to enable the feature in that local build would be: (1) Just change `value: false` to `value: true` in the first snippet that you quoted in comment 21 (no need for the ifdefs or `IS_NOT_EARLY_BETA_OR_EARLIER` variable). (2) Or you can just do a build of the unmodified source code, and then after you launch Firefox on your actual phone, visit `about:config` and search for this `media.hls.enabled` preference, and toggle its value to `true`.