Safari presidence for background pages and scripts #38635
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FYI @jdatapple |
Rob--W
reviewed
Mar 14, 2025
| @@ -186,8 +186,7 @@ Support for the `scripts`, `page`, and `service_worker` properties varies betwee | |||
| - `background.service_worker` is not supported (see [Firefox bug 1573659](https://bugzil.la/1573659)). | |||
| - supports `background.scripts` (or `background.page`) if `service_worker` is not specified or the service worker feature is disabled. Before Firefox 120, Firefox did not start the background page if `service_worker` was present (see [Firefox bug 1860304](https://bugzil.la/1860304)). From Firefox 121, the background page starts as expected, regardless of the presence of `service_worker`. | |||
| - Safari: | |||
| - supports `background.service_worker`. | |||
| - supports `background.scripts` (or `background.page`) if `service_worker` is not specified. | |||
| - supports `background.scripts` (or `background.page`) and `background.service_worker`. If both are specified, uses `background.scripts` (or `background.page`), unless `preferred_environment` is set to `service_worker`. | |||
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In Safari (18+) only, if preferred_environment is set to service_worker AND background.service_worker is absent AND background.scripts is present, then these scripts are all executed in a service worker context. @xeenon should that be documented here? (Somewhere?)
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Description
Clarifies that by default when both background pages/scripts and service workers are specified, Safari uses backgrounds pages/script
Related issues and pull requests
Fixes #35630