BUG

When trying to define a custom function to modify headers as described here, I can't save the rule. Header name cannot be empty shows, despite there being no header name field. I assume the code is supposed to always receive all headers and therefore the rule doesn't need to include a specific header name, but the UI prevents this.

Environment

• Extension version: Header Editor 5.2.4 manifest v2
• Browser version: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:143.0) Gecko/20100101 Firefox/143.0

Rules and test address

• Rule type: Modify response header
• Execution type: Custom function
• Code:

  for (const a in val) {
  	if (val[a].name.toLowerCase() === 'user-agent') {
  		val[a].value += ' HE/2.0.0';
  		break;
  	}
  }