crosstab function is not accessible to non-postgres users - postgresql

Question

I've installed tablefuncs via create extension tablefuncs and can use crosstab from the postgres account. However, its not visible/usable to non-postgres users.
From postgres account:
\dx
List of installed extensions
Name | Version | Schema | Description
-----------+---------+------------+------------------------------------------------------------
plpgsql | 1.0 | pg_catalog | PL/pgSQL procedural language
tablefunc | 1.0 | public | functions that manipulate whole tables, including crosstab
(2 rows)
From non-postgres users:
abxdb=> set search_path to abx, public;
SET
abxdb=> \dx
List of installed extensions
Name | Version | Schema | Description
------------------+---------+------------+---------------------------------------------------------------------
plpgsql | 1.0 | pg_catalog | PL/pgSQL procedural language
postgis | 2.0.7 | public | PostGIS geometry, geography, and raster spatial types and functions
postgis_topology | 2.0.7 | topology | PostGIS topology spatial types and functions
This is the example I'm trying to run:
CREATE TABLE example (
id int,
key text,
value text
);
INSERT INTO example VALUES
(123, 'firstName', 'John'),
(123, 'lastName', 'Doe');
SELECT *
FROM crosstab(
'SELECT *
FROM example
ORDER BY id ASC, key ASC;'
) AS ct(id INT, firstname TEXT, lastname TEXT);
I've tried creating the extension in the non-postgres account, but it must be created under postgres.