用about：config覆盖Firefox不安全的警告 [英] Override Firefox Insecure Warnings with about:config

问题描述

我试图编写一个简单的批处理脚本来截取我内部网页的截图，并且发现firefox有这个能够将窗口渲染到canvas的事实：

  var canvas = document.createElement（'canvas'）; 
 var ctx = canvas.getContext（2d）; 
 ctx.drawWindow（window，0，0，100，200，rgb（255,255,255））; 
 console.log（canvas.toDataURL（image / png））; 
  

但是，这似乎只保留了表单扩展名并引发错误：操作是不安全的。 / p>

我不需要把这个发布给任何其他人，我很乐意仅对我的Firefox进行一些内部调整，以避免创建扩展。是否有一些关于：配置设置（或其他）我可以调整，只要让它通过，即使它不是在扩展？

解决方案

转到 about：config 并将 devtools.chrome.enabled 设置为 true

重新启动

转到您想要截取的选项卡

按 Shift +
将环境切换到浏览器

粘贴以下代码片段

  var canvas = gBrowser.contentDocument.createElement（'canvas'）; 
 var ctx = canvas.getContext（2d）; 
 ctx.drawWindow（window，0，0，100，200，rgb（255,255,255））; 
 canvas.toDataURL（image / png）;将光标放在最后一行的末尾
 
按键，控制 +  L  
 
完成任务！
 
I am trying to write a simple batch script to take some screenshots of internal webpages on my end and came across the fact that firefox has this ability to render the window to canvas:
var canvas = document.createElement('canvas');
var ctx = canvas.getContext("2d");
ctx.drawWindow(window, 0,0, 100, 200, "rgb(255,255,255)");
console.log(canvas.toDataURL("image/png"));
However, this seems to be reserved only form extensions and throws an Error: The operation is insecure.

I don't need to publish this to anyone else and I'm happy to make some internal adjustment to only my Firefox to avoid creating an extension. Is there some sort of about:config setting (or something else) I can tweak to just let this go through even if it's not in an extension?
解决方案
Go to about:config and set devtools.chrome.enabled to true

Restart

Go to the tab you want to take screenshot

Press Shift+F4

Switch environment to Browser

Paste the following snippet  
var canvas = gBrowser.contentDocument.createElement('canvas');
var ctx = canvas.getContext("2d");
ctx.drawWindow(window, 0,0, 100, 200, "rgb(255,255,255)");
canvas.toDataURL("image/png");
Place the cursor at the end of the last line

Press Control+L

Mission accomplished!

                        
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