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Note that opening a view does not cause the event page to load, but only prevents it from closing once loaded.Įffective background scripts stay dormant until an event they are listening for fires, react with specified instructions, then unload. Additionally, the background page will not unload until all visible views and all message ports are closed. Once it has been loaded, a background page will stay running as long as it is performing an action, such as calling a Chrome API or issuing a network request.

Another view in the extension, such as a popup, calls runtime.getBackgroundPage.

A content script or other extension sends a message.

The background page was listening for an event, and the event is dispatched.

The extension is first installed or updated to a new version.

Extensions monitor these events in their background script, then react with specified instructions.Ī background page is loaded when it is needed, and unloaded when it goes idle. Events are browser triggers, such as navigating to a new page, removing a bookmark, or closing a tab. You will find a section on upgrading in the navigation tree at the left, including the Manifest V2 support timeline.Įxtensions are event based programs used to modify or enhance the Chrome browsing experience. Please use Manifest V3 when building new extensions.

To use all the same settings, including wallpaper, on every Chromebook that you sign in to, turn on Sync everything.The Chrome Web Store no longer accepts Manifest V2 extensions. In the 'Accounts' section, select Sync and Google services.Use the same wallpaper across multiple Chromebooks To use a personal photo saved in your Google Photos account, select Google Photos.To set a custom wallpaper with an image downloaded to your Chromebook, select My Images.To choose a wallpaper with a light or dark theme, select Radiance.You can also select the wallpaper to change daily or refresh.

Select one of the images to set as your wallpaper.

If you can't change your wallpaper, contact your administrator for more help. Note: If you use your Chromebook at work or school, your administrator might not let you change your wallpaper. You can personalise your Chromebook with a custom wallpaper for your desktop.