Delete your cookies regularly... here's how with Python and Firefox.
Maximum privacy, no need for extensions.<p><pre><code> import sqlite3
import pprint
def cnt():
rows=csr.execute("select count(*) as nr from moz_cookies").fetchall()
return rows[0][0]
db=sqlite3.connect(r'C:\Users\XXXXXX\AppData\Roaming\Mozilla\Firefox\Profiles\YYYYYYYYYYYYYYYYYY\cookies.sqlite')
csr=db.cursor()
ckbefore=cnt()
rows=csr.execute("select host,count(*) as nr from moz_cookies group by 1").fetchall()
for r in rows: print("- %3d %s" % (int(r[1]),r[0]) )
csr.execute("delete from moz_cookies where host not in ("
" 'your', 'own', 'list', 'of', "
" 'sites', 'you', 'trust')")
db.commit()
ckafter=cnt()
print("%d > %d cookies" % (ckbefore,ckafter) );
csr.close()
db.close()</code></pre>