When I was here the last time, it was easy to find the correct version of an extension for my mediawikiversion - which is 1.17.0 - as than subversion was used to download snapshots. Now it is almost impossible to find the correct version as GIT ist used and only the newest snapshot is easyly found, while the correct old versions are almost impossible to identify.
Now I need Extension:ConfirmEdit to block spam and the newest snapshot doesn't work and I don't know if this is because it is not the correct version.