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

This is an asynchronous function that returns a Promise.

Syntax

var removing = browser.sessions.removeTabValue(
  tabId,    // integer
  key       // string
)

Parameters

tabId
integer. ID of the tab whose data you are trying to remove.
key
string. Key identifying the particular value to remove. This needs to match the key previously given in sessions.setTabValue.

Return value

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxOperaFirefox for Android
removeTabValueChrome No support NoEdge No support NoFirefox Full support 57Opera No support NoFirefox Android No support No

Legend

Full support  
Full support
No support  
No support

Examples

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

async function setOnActiveTab() {
  let tabArray = await browser.tabs.query({currentWindow: true, active: true});
  let tabId = tabArray[0].id;
  await browser.sessions.setTabValue(tabId, "my-key", "my-value");
}

async function removeFromActiveTab() {
  let tabArray = await browser.tabs.query({currentWindow: true, active: true});
  let tabId = tabArray[0].id;
  await browser.sessions.removeTabValue(tabId, "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") {
    setOnActiveTab();
  } else {
    removeFromActiveTab();
  }
});

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