0948名無しさん@お腹いっぱい。垢版2019/05/18(土) 00:07:45.13ID:e/BytQVM0 来てた Disabled Add-on Fix for Firefox 47 - 56 https://addons.mozilla.org/en-US/firefox/addon/disabled-add-on-fix-52-56/ This extension will re-enable extensions that were disabled on May 3, 2019 for Firefox versions 47 - 56.