How to run firefox in native app of an extension? - firefox-addon

Question

I'm trying simple modify an extension example to run firefox,but I get a message prompt :
Firefox is already running,but is no responding. To open a new new window, you must firest close the existing Firefox process, or restart your system.
#!/usr/bin/env python3
import sys
import json
import struct
import subprocess
try:
# Python 3.x version
# Read a message from stdin and decode it.
def getMessage():
rawLength = sys.stdin.buffer.read(4)
if len(rawLength) == 0:
sys.exit(0)
messageLength = struct.unpack('#I', rawLength)[0]
message = sys.stdin.buffer.read(messageLength).decode('utf-8')
return json.loads(message)
# Encode a message for transmission,
# given its content.
def encodeMessage(messageContent):
encodedContent = json.dumps(messageContent).encode('utf-8')
encodedLength = struct.pack('#I', len(encodedContent))
return {'length': encodedLength, 'content': encodedContent}
# Send an encoded message to stdout
def sendMessage(encodedMessage):
sys.stdout.buffer.write(encodedMessage['length'])
sys.stdout.buffer.write(encodedMessage['content'])
sys.stdout.buffer.flush()
while True:
receivedMessage = getMessage()
if receivedMessage == "ping":
run_result=subprocess.run('firefox -P firefox_word ',shell=True,stdout=subprocess.PIPE)
sendMessage(encodeMessage("pong3"))
except AttributeError:
pass
My purpose is open a local html file by my extension or native app of my extension.

Answer 1

I had a similar issue a while ago, also when I was experimenting with WebExtensions examples. I think the problem is with your Firefox profile. The solution that worked for me was to create a new profile, then (after a day or so) reopen the previous profile. It has been fine since then. I do not know any more details about the problem.
The Mozilla page "Firefox is already running but is not responding" error message - How to fix it describes this solution as well as a number of others (which I tried, but did not have success with).
You can start the Firefox Profile Manager as per the following instructions (see here for complete details):
If Firefox is open, close Firefox:
Press Windows Key + R on the keyboard. A Run dialog will open.
In the Run dialog box, type in: firefox.exe -P Click OK. The Firefox Profile Manager (Choose User Profile) window should open.
Create a new profile, click 'Start Firefox'
To open your previous profile, launch Profile Manager again and select your default profile

Answer 2

For me I need work in same profile,now my solution is made a shell script as daemon to read a fifo and my native app of my extension write that fifo when I need run firefox.
Note you need run that daemon outside the native app of extension.