To find the correct solution to your problem, we need some more non-personal information from you. Please do the following:
Use ONE of these methods to open the Firefox Troubleshooting Information page:
Click the menu button , click on help and select Troubleshooting Information.
Type about:support into the Firefox address bar and press the enter key.
At the top of the Troubleshooting Information page that comes up, you should see a button that says "Copy text to clipboard". Click it.
Now, go back to your forum post, right-click in the reply box and select Paste from the context menu (or else click inside the reply box and press the Ctrl+V keys) to paste all the information you copied into the forum post.