Safari extensions issue

[Orka]

Im not able to download not a singe extension, it says in extension gallery:

Extensions in this gallery are compatible with Safari 9.0 or later on OS X El Capitan.

• Please upgrade to OS X El Capitan which includes Safari 9.0.

am i doing something wrong? It used to work just fine.

I just downgraded to Mavericks after trying mac os sierra for few hours and using el capitan for almost a year and to my surprise i can no longer use extensions (i was trying to install adguard).

 

[Ulenspiegel]

It's been the way with Mavericks, for a while.
You still can download the needed extensions from the site of developers.
(The Adguard Safari extension can be downloaded here. Scroll down on the site, until you see a yelow icon "Install Adguard 1.3 MB browser extension". It will download a file "Adguard-2.5.11.safariextz", click on it and you are done).
ни пуха, ни пера