browser is not defined in firefox about webextensions-examples

[Rob--W]

The tabs documentation ( https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs ) is part of the documentation of APIs for WebExtensions. That includes tutorials to run extension code

Are you able to find answers to your questions at:
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions

[dumpster-of-things]

The (Tabs API) examples featured in the documentation you linked to use the following syntax:
browser.tab ...
But it never mentions how to set browser and there does not appear to be any documentation on MDN about the predicate browser variable.

Can the Tabs API be interacted with directly through the console, or will I need to author [and publish?] a browser extension?

[rebloor]

@dumpster-of-things I suspect your problem is that you need Toolbox for browser to be defined when you run snippets in the console. To do this, open about:debugging then This Firefox, click Inspect against any installed or temporary extension, and open Console. You can then paste and run the example code in the console.