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由 Revenge 发表于 Sept. 27, 2017 ·

This add-on is not compatible with your version of Firefox.
(57.0b3 x64)

这个评论是针对附加组件的一个早期版本的（5.10）。 

作者 Oleksandr (开发者) 日期 Sept. 27, 2017 ·

Unfortunately, WebExtensions (the new API for Firefox 57+) does not have the functionality for the correct operation of this addon in Firefox.
So this addon will no longer work with the release of Firefox 57 in November 2017!
This is the inevitable change in Firefox - all Xul-addons will die out in Firefox 57
https://blog.mozilla.org/addons/2017/02/16/the-road-to-firefox-57-compatibility-milestones/

But you can install Firefox 52 ESR and enjoy work until June 2018
https://www.mozilla.org/en-US/firefox/organizations/faq/