browserAction.setBadgeBackgroundColor()

Sets the background color for the badge. Tabs without a specific badge background color will inherit the global badge background color, which defaults to [217, 0, 0, 255] in Firefox.

From Firefox 63, unless the badge text color is explicitly set using browserAction.setBadgeTextColor(), then the badge text color will be automatically set to black or white so as to maximize contrast with the specified badge background color. For example, if you set the badge background color to white, the default badge text color will be set to black, and vice versa.

Other browsers always use a white text color, so setting a dark background may be preferable to ensure the text is readable.

Syntax

browser.browserAction.setBadgeBackgroundColor(
  details // object
)

Parameters

details
object.
color
The color, specified as one of:
  • a string: any CSS <color> value, for example "red", "#FF0000", or "rgb(255,0,0)". If the string is not a valid color, the returned promise will be rejected and the background color won't be altered.
  • a browserAction.ColorArray object.
  • null. If a tabId is specified, it removes the tab-specific badge background color so that the tab inherits the global badge background color. Otherwise it reverts the global badge background color to the default value.
tabIdOptional
integer. Sets the badge background color only for the given tab. The color is reset when the user navigates this tab to a new page.
windowIdOptional
integer. Sets the badge background color only for the given tab.
  • If windowId and tabId are both supplied, the function fails and the color is not set.
  • If windowId and tabId are both omitted, the global badge background color is set instead.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxOperaFirefox for Android
Basic supportChrome Full support YesEdge Full support 14Firefox Full support 45
Full support 45
No support 45 — 58
Notes
Notes Tab-specific badge background color is not cleared when a new page is loaded.
Opera Full support YesFirefox Android No support No
The color property of the details parameter can be set to a string.Chrome Full support YesEdge No support NoFirefox Full support Yes
Notes
Full support Yes
Notes
Notes Before Firefox 59, invalid color strings behaved as null.
Opera ? Firefox Android No support No
The color property of the details parameter can be set to null.Chrome No support NoEdge No support NoFirefox Full support 59Opera No support NoFirefox Android No support No
details.windowIdChrome No support NoEdge No support NoFirefox Full support 62Opera No support NoFirefox Android No support No

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
See implementation notes.
See implementation notes.

The default color in Firefox is: [217, 0, 0, 255].

Examples

A background color that starts off as red, and turns green when the browser action is clicked:

browser.browserAction.setBadgeText({text: "1234"});
browser.browserAction.setBadgeBackgroundColor({color: "red"});

browser.browserAction.onClicked.addListener(()=> {
  browser.browserAction.setBadgeBackgroundColor({color: "green"});
});

Set the badge background color only for the active tab:

browser.browserAction.setBadgeText({text: "1234"});
browser.browserAction.setBadgeBackgroundColor({color: "red"});

browser.browserAction.onClicked.addListener((tab)=> {
  browser.browserAction.setBadgeBackgroundColor({
    color: "green",
    tabId: tab.id
  });
});

Example extensions

Acknowledgements

This API is based on Chromium's chrome.browserAction API. This documentation is derived from browser_action.json in the Chromium code.

Microsoft Edge compatibility data is supplied by Microsoft Corporation and is included here under the Creative Commons Attribution 3.0 United States License.

Document Tags and Contributors

Last updated by: Loirooriol,