Zotero: LibreOffice Plugin 3.5.9がインストールできない（ウィンドウが空）

Problem: I can't install the LibreOffice plugin because the installation page on Firefox is blank (Fig.1).

Fig.1

 Solution: Disable Adblock Plus and restart Firefox (Fig.2).

Fig.2

This happened under the following two environments:

1. OSX 10.6.8, iMac 2006 Intel Core 2 Duo, Firefox 35.0.1
2. Yosemite 10.10.2 Macbook Air 2011, Firefox 34.???

Reference:  https://forums.zotero.org/discussion/42895/cant-install-libreoffice-plugin-359-firefox-extension/#Comment_215148