diff --git a/docs/supportedsites.rst b/docs/supportedsites.rst
index 75abcc65..a22434bf 100644
--- a/docs/supportedsites.rst
+++ b/docs/supportedsites.rst
@@ -44,7 +44,7 @@ Komikcast            https://komikcast.com/              Chapters, Manga
 Konachan             https://konachan.com/               Pools, Popular Images, Posts, Tag-Searches
 Love is Over Archive https://archive.loveisover.me/      Threads
 Luscious             https://luscious.net/               Albums
-Manga Fox            http://www.mangafox.me/             Chapters
+Manga Fox            http://fanfox.net/                  Chapters
 Manga Here           http://www.mangahere.co/            Chapters, Manga
 Manga Stream         https://mangastream.com/            Chapters
 Mangapanda           http://www.mangapanda.com/          Chapters, Manga
@@ -79,23 +79,15 @@ Warosu               https://warosu.org/                 Threads
 World Three          http://www.slide.world-three.org/   Chapters, Manga
 XVideos              https://www.xvideos.com/            Images from Users, Galleries
 Yandere              https://yande.re/                   Pools, Popular Images, Posts, Tag-Searches
-YEET Archive         https://archive.yeet.net/           Threads
 Acidimg              https://acidimg.cc/                 individual Images
-Chronos              http://chronos.to/                  individual Images
-Coreimg              http://coreimg.net/                 individual Images
 Fapat                http://fapat.me/                    individual Images
-Hosturimage          https://hosturimage.com/            individual Images
-Imageontime          http://imageontime.org/             individual Images
 Imagetwist           https://imagetwist.com/             individual Images
 Imagevenue           http://imagevenue.com/              individual Images
-Img4ever             https://img4ever.net/               individual Images
 Imgcandy             http://imgcandy.net/                individual Images
-Imgmaid              https://imgmaid.net/                individual Images
 Imgspice             https://imgspice.com/               individual Images
 Imgspot              http://imgspot.org/                 individual Images
 Imgtrex              http://imgtrex.com/                 individual Images
 Imgtrial             http://imgtrial.com/                individual Images
-Imgupload            https://imgupload.yt/               individual Images
 Imgyt                https://img.yt/                     individual Images
 Picmaniac            http://pic-maniac.com/              individual Images
 Pixhost              https://pixhost.org/                individual Images
diff --git a/gallery_dl/extractor/imagehosts.py b/gallery_dl/extractor/imagehosts.py
index 9d14b2ea..aefccdda 100644
--- a/gallery_dl/extractor/imagehosts.py
+++ b/gallery_dl/extractor/imagehosts.py
@@ -10,7 +10,7 @@
 
 from .common import Extractor, Message
 from .. import text, exception
-from ..cache import cache
+from ..cache import memcache
 from os.path import splitext
 from urllib.parse import urljoin
 
@@ -126,20 +126,10 @@ class AcidimgImageExtractor(ImgytImageExtractor):
     test = []
 
 
-class ChronosImageExtractor(ImagehostImageExtractor):
-    """Extractor for single images from chronos.to"""
-    category = "chronos"
-    pattern = [r"(?:https?://)?((?:www\.)?chronos\.to/([a-z0-9]{12}))"]
-    test = [
-        ("http://chronos.to/bdrmq7rw7v4y", {
-            "url": "7fcb3fe315c94283644d25ef47a644c2dc8da944",
-            "keyword": "04dbc71a1154728d01c931308184050d61c5da55",
-            "content": "0c8768055e4e20e7c7259608b67799171b691140",
-        }),
-        ("http://chronos.to/bdrmq7rw7v4z", {
-            "exception": exception.NotFoundError,
-        }),
-    ]
+class PicmaniacImageExtractor(ImagehostImageExtractor):
+    """Extractor for single images from pic-maniac.com"""
+    category = "picmaniac"
+    pattern = [r"(?:https?://)?((?:www\.)?pic-maniac\.com/([a-z0-9]{12}))"]
     https = False
     params = "complex"
 
@@ -151,77 +141,6 @@ class ChronosImageExtractor(ImagehostImageExtractor):
         return url, filename
 
 
-class CoreimgImageExtractor(ChronosImageExtractor):
-    """Extractor for single images from coreimg.net"""
-    category = "coreimg"
-    pattern = [r"(?:https?://)?((?:www\.)?coreimg\.net/([a-z0-9]{12}))"]
-    test = [("http://coreimg.net/ykcl5al8uzvg", {
-        "url": "2b32596a2ea66b7cc784e20f3749f75f20998d78",
-        "keyword": "8d71e5b820bc7177baee33ca529c91ae4521299f",
-        "content": "0c8768055e4e20e7c7259608b67799171b691140",
-    })]
-
-
-class ImgmaidImageExtractor(ChronosImageExtractor):
-    """Extractor for single images from imgmaid.net"""
-    category = "imgmaid"
-    pattern = [r"(?:https?://)?((?:www\.)?imgmaid\.net/([a-z0-9]{12}))"]
-    test = []
-    https = True
-
-
-class PicmaniacImageExtractor(ChronosImageExtractor):
-    """Extractor for single images from pic-maniac.com"""
-    category = "picmaniac"
-    pattern = [r"(?:https?://)?((?:www\.)?pic-maniac\.com/([a-z0-9]{12}))"]
-    test = []
-
-
-class HosturimageImageExtractor(ImagehostImageExtractor):
-    """Extractor for single images from hosturimage.com"""
-    category = "hosturimage"
-    pattern = [(r"(?:https?://)?((?:www\.)?hosturimage\.com/"
-                r"img-([a-z0-9]+)\.html)")]
-    test = [("https://hosturimage.com/img-581ca97112bf8.html", {
-        "url": "c672a3fd7fd48e5506d020aa19c4ac91ba078671",
-        "keyword": "c3c94340b8e395e07b5145cf17534b5871ec8593",
-        "content": "0c8768055e4e20e7c7259608b67799171b691140",
-    })]
-    https = True
-
-    def get_info(self, page):
-        pos = page.index("<img class='centred")
-        url = text.extract(page, " src='", "'", pos)[0]
-        return url, url
-
-
-class ImageontimeImageExtractor(HosturimageImageExtractor):
-    """Extractor for single images from imageontime.org"""
-    category = "imageontime"
-    pattern = [(r"(?:https?://)?((?:www\.)?imageontime\.org/"
-                r"img-([a-z0-9]+)\.html)")]
-    test = []
-    https = False
-
-
-class Img4everImageExtractor(HosturimageImageExtractor):
-    """Extractor for single images from img4ever.net"""
-    category = "img4ever"
-    pattern = [(r"(?:https?://)?((?:www\.)?img4ever\.net/"
-                r"img-([a-z0-9]+)\.html)")]
-    test = []
-    https = True
-
-
-class ImguploadImageExtractor(HosturimageImageExtractor):
-    """Extractor for single images from imgupload.yt"""
-    category = "imgupload"
-    pattern = [(r"(?:https?://)?((?:www\.)?imgupload\.yt/"
-                r"img-([a-z0-9]+)\.html)")]
-    test = []
-    https = True
-
-
 class ImgspotImageExtractor(ImagehostImageExtractor):
     """Extractor for single images from imgspot.org"""
     category = "imgspot"
@@ -266,7 +185,7 @@ class ImagetwistImageExtractor(ImagehostImageExtractor):
     params = None
 
     @property
-    @cache(maxage=3*60*60)
+    @memcache(maxage=3*60*60)
     def cookies(self):
         return self.request(self.url).cookies
 
diff --git a/test/test_extractors.py b/test/test_extractors.py
index bc409729..1f7239bb 100644
--- a/test/test_extractors.py
+++ b/test/test_extractors.py
@@ -18,11 +18,6 @@ SKIP = {
     "archivedmoe", "archiveofsins", "thebarchive",
 
     # temporary issues
-    "chronos",
-    "coreimg",
-    "hosturimage",
-    "imgtrex",
-    "yeet",
 }