How can a script from a local machine can work based on Firefox's flag

Question

Is there a simple way for Firefox to send a simple flag value to the local machine, so a program inside the local machine can react upon the flag.

I have put so much effort in cookies, extensions and even Javascript read/write file .. all of it failed. i just wanted a way that the Firefox can give signal to local machine. That's all.

For example, I create a simple extension that monitors a certain URL. Then, when the URL is visited, Firefox will signal something or set a flag. I will code a simple script to read the flag and do other things..

I am on Linux platform.

Answer 1

Try using Applets to access the clients machine, this doesn't limit you to use Firefox other browsers as well.

Answer 2

you can write to a file on disk, the application on your local machine can monitor for this file existence and act upon it.

I also suggest that the "other" application rename the file as soon as it find it so firefox can single again.

see here about Firefox file i/o using java script