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sessions.removeWindowValue()

Removes a value previously stored by a call to sessions.setWindowValue.

This is an asynchronous function that returns a Promise.

Syntax

var removing = browser.sessions.removeWindowValue(
  windowId,    // integer
  key          // string
)

Parameters

windowId: integer. ID of the window whose data you are trying to remove. Error is thrown if ID is invalid.
key: string. Key identifying the particular value to remove. This needs to match the key previously given in sessions.setWindowValue.

Return value

A Promise that will be resolved no arguments if the item was successfully removed. If the call failed (for example, because the window ID could not be found) then the promise will be rejected with an error message.

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`removeWindowValue`	No	No	57	?	No	No	?	?	No	?	?	?

Examples

This code adds two context menu items: one stores a value associated with the current window, the other one removes it:

async function setOnActiveWindow() {
  let currentWindow = await browser.windows.getLastFocused();
  await browser.sessions.setWindowValue(currentWindow.id, "my-key", "my-value");
}

async function removeFromActiveWindow() {
  let currentWindow = await browser.windows.getLastFocused();
  await browser.sessions.removeWindowValue(currentWindow.id, "my-key");
}

browser.menus.create({
  id: "add-my-item",
  title: "add item",
  contexts: ["all"]
});

browser.menus.create({
  id: "remove-my-item",
  title: "remove item",
  contexts: ["all"]
});

browser.menus.onClicked.addListener((info) => {
  if (info.menuItemId === "add-my-item") {
    setOnActiveWindow();
  } else {
    removeFromActiveWindow();
  }
});

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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/sessions/removeWindowValue