not working((
When I try to use this extension, I see:

300: jar:file:///Users/pavel/Library/Application%20Support/Firefox/Profiles/gnzh2o7v.default-release/extensions/%7Ba0d7ccb3-214d-498b-b4aa-0e8fda9a7bf7%7D.xpi!/
200: filename content-length last-modified file-type
201: META-INF/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: _locales/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: addReview.html 2781 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: breachInfo.html 1655 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: error.html 842 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: images/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: libs/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: loggedOut.html 2545 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: manifest.json 6298 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: offering.html 1439 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: options.html 2687 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: popup.html 1476 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: presettings.html 2288 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: resources/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: scripts/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: slider.html 5906 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE
201: styles/ 0 Mon,%2031%20Dec%201979%2019:00:00%20GMT DIRECTORY
201: systempage.html 933 Thu,%2029%20Nov%201979%2019:00:00%20GMT FILE