How to Integrate SingleFile-MV3 into a Browser Extension

[tangxiaoqi-tangxiao]

I have configured manifest.json and background.js according to the documentation, but when I execute await extension.getPageData in content.js, it indicates that extension does not exist. I am not sure what the reason is. I am not very experienced with browser extension development and might be making some simple mistakes without realizing it.

Here is my code:
manifest.json
background.js：

content.js：

[gildas-lormeau]

Here's a complete example in the ZIP file.

Uploading SingleFile-Mini-MV3.zip…