I am looking at the API for chrome.contextMenu here.
The context types listed are:
Some of these are intuitive, the others not so much.
Where can I find definitions for these different contexts? It is hard to make use of the api without this background knowledge.
Specifically, I would like to know "page", "frame", "editable", and "launcher".
link, image, video, audio are more or less self-explanatory; they correspond to right-clicks on the appropriate HTML elements.editable means a right-click in any text input element (when text is not selected, I think). It can be something obvious like <input>, <textarea> or any tag with content-editable enabled. This question may be of interest.page means a right-click on any space on the page that is not covered by the above.all is all of the above combined.frame is like all, but only for content within <iframe>s and not the parent document. (source & rationale)selection means a right-click on a selected part of text/HTML; a text-only copy of the content will be passed to the callback, and a content script can be used to access the DOM of the selection.browser_action and page_action populate your icon's context menu when using Browser Actions and/or Page Actions, although these are superseded by action in Manifest v3.launcher only makes sense for Chrome Apps; it adds context menu entries to the App's shortcut in the App Launcher.