参考扩展 Menu Editor。它允许你给菜单选项重新排序、也可让你隐藏菜单选项。
首先，定位到个人配置文件夹，找到名为 "chrome" 的子文件夹。你需要编辑该文件夹下的 userChrome.css 文件，如果它不存在就新建之。
把下面这行加入 userChrome.css 文件，将可以隐藏任何右键菜单选项。
#id1, #id2 { display:none !important; }
把 #id1, #id2 替换为下面的任何一项：(指明每个选项所对应的右键菜单选项)
| #context-openlink | Open Link in New Window |
| #context-openlinkintab | Open Link in New Tab |
| #context-sep-open | line separator |
| #context-bookmarklink | Bookmark This Link... |
| #context-savelink | Save Link As... |
| #context-sendlink | Send Link... |
| #context-copyemail | Copy Email Address |
| #context-copylink | Copy Link Location |
| #context-sep-copylink | line separator |
| #context-viewimage | View Image |
| #context-copyimage-contents | Copy Image |
| #context-copyimage | Copy Image Location |
| #context-sep-copyimage | line separator |
| #context-saveimage | Save Image As... |
| #context-sendimage | Send Image... |
| #context-setWallpaper | Set As Wallpaper... |
| #context-blockimage | Block Images from... |
| #context-back | Back |
| #context-forward | Forward |
| #context-reload | Reload |
| #context-stop | Stop |
| #context-sep-stop | line separator |
| #context-bookmarkpage | Bookmark This Page... |
| #context-savepage | Save Page As... |
| #context-sendpage | Send Page... |
| #context-sep-viewbgimage | line separator |
| #context-viewbgimage | View Background Image |
| #context-undo | Undo |
| #context-sep-undo | line separator |
| #context-cut | Cut |
| #context-copy | Copy |
| #context-paste | Paste |
| #context-delete | Delete |
| #context-sep-paste | line separator |
| #context-selectall | Select All |
| #context-sep-selectall | line separator |
| #context-keywordfield | Add a Keyword for this Search... |
| #context-searchselect | Search Web for ... |
| #frame-sep | line separator |
| #frame | This Frame |
| #context-sep-properties | line separator |
| #context-viewpartialsource-selection | View Selection Source |
| #context-viewpartialsource-mathml | View MathML Source |
| #context-viewsource | View Page Source |
| #context-viewinfo | View Page Info |
| #context-metadata | Properties |
| #context-sep-bidi | line separator |
| #context-bidi-text-direction-toggle | Switch Text Direction |
| #context-bidi-page-direction-toggle | Switch Page Direction |
例如，隐藏 "View Background"(查看背景) 菜单选项以及之后的水平线：
#context-viewbgimage, #context-sep-viewbgimage { display: none !important; }加上一段,在菜单项无效时隐藏
/*
* 隐藏右键菜单,不活动时隐藏
*/
#context-back[ disabled ="true"] ,
#context-forward[ disabled ="true"] ,
#context-stop[ disabled ="true"] ,
#context-viewbgimage[ disabled ="true"]{ display: none !important; }
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