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README.md

session-state

What it does

This extension adds a context menu item. When the user clicks the context menu item, the extension adds a border to the page.

But the extension also uses sessions.setTabValue to store the fact that it has added a border to this page. If the user closes the page, then restores it, the extension will retrieve this fact using sessions.getTabValue, and use that to reapply the border.

Note: to restore a tab, press Control+Shift+T (or Command+Shift+T on a Mac). In Firefox you can also restore the tab from your "History->Recently Closed Tabs" menu.

What it shows

This example demonstrates how you can use the sessions API to store and retrieve arbitrary state that you want to associate with a tab or window. Then if the tab/window is closed and subsequently restored, you can retrieve the state.