[philomena] support furbooru.org (closes #1995)

docs/supportedsites.md

@@ -937,6 +937,12 @@ Consider all sites to be NSFW unless otherwise known.
     <td>Galleries, Posts, Search Results</td>
     <td><a href="configuration.rst#extractorderpibooruapi-key">API Key</a></td>
 </tr>
+<tr>
+    <td>Furbooru</td>
+    <td>https://furbooru.org/</td>
+    <td>Galleries, Posts, Search Results</td>
+    <td></td>
+</tr>
 <tr>
     <td>Ponybooru</td>
     <td>https://ponybooru.org/</td>

gallery_dl/extractor/philomena.py

@@ -62,6 +62,8 @@ INSTANCES = {
                    "filter_id": "56027"},
     "ponybooru" : {"root": "https://ponybooru.org",
                    "filter_id": "2"},
+    "furbooru"  : {"root": "https://furbooru.org",
+                   "filter_id": "2"},
 }
 
 BASE_PATTERN = PhilomenaExtractor.update(INSTANCES)
@@ -124,6 +126,9 @@ class PhilomenaPostExtractor(PhilomenaExtractor):
         ("https://ponybooru.org/images/1", {
             "content": "bca26f58fafd791fe07adcd2a28efd7751824605",
         }),
+        ("https://furbooru.org/images/1", {
+            "content": "9eaa1e1b32fa0f16520912257dbefaff238d5fd2",
+        }),
     )
 
     def __init__(self, match):
@@ -157,6 +162,10 @@ class PhilomenaSearchExtractor(PhilomenaExtractor):
             "range": "40-60",
             "count": 21,
         }),
+        ("https://furbooru.org/search?q=cute", {
+            "range": "40-60",
+            "count": 21,
+        }),
     )
 
     def __init__(self, match):
@@ -210,6 +219,9 @@ class PhilomenaGalleryExtractor(PhilomenaExtractor):
         ("https://ponybooru.org/galleries/27", {
             "count": ">= 24",
         }),
+        ("https://furbooru.org/galleries/27", {
+            "count": ">= 13",
+        }),
     )
 
     def __init__(self, match):