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How can I activate my extension for Reader Mode?

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I would like my dictionary extension to work for all modes, especially in Firefox's Reader Mode, which I use all the time to read articles.

I would like my dictionary extension to work for all modes, especially in Firefox's Reader Mode, which I use all the time to read articles.

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Hi, running a beta is not the best way. Do not think you can. If this Extension works in beta it is a dictionary popup , stuff like that is all you are going to find. https://addons.mozilla.org/en-US/firefox/addon/english-popup-dictionary/

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WebExtensions do not work with about page like reader mode uses (about:reader), so this isn't possible.