非常不错的插件！
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A note for those wondering if this extension holds an overhead permission:

According to https://support.mozilla.org/en-US/kb/permission-request-messages-firefox-extensions#w_access-your-data-for-all-websites

Extensions requesting this permission might:
...Provide an ad blocker by reading the content of each web page you open to find and remove ad code.

Seems an necessary permission to provide "remove and restore context menu" function.