This Extension allows differenciating editing permissions for the first post. It also allows bypassing the max edit time setting for the first or all posts on a per-forum basis. If you use other extensions that change users edit permissions, please check thoroughly whether they still work correctly in combination with this extension.
Clone into ext/gn36/firstpostedit:
git clone https://github.com/gn36/phpbb-ext-firstpostedit ext/gn36/firstpostedit
Go to "ACP" > "Customise" > "Extensions" and enable the "gn36 - Allow edit first post" extension.
If you find a bug, please report it on https://github.com/gn36/phpbb-ext-firstpostedit
We use automated unit tests including functional tests to prevent regressions. Check out our travis build below: