====== 調整頁面縮放上下限 ======

參考：
[[https://www.ilovefreesoftware.com/04/tutorial/change-default-minimum-maximum-zoom-levels-firefox.html|How To Change Default Minimum and Maximum Zoom Levels In Firefox]]

''zoommanager'' 好像也一定要修改才行。

設完後還要重開 Firefox 才生效。