diff --git a/docs/conf.py b/docs/conf.py
index 6e2399f66..4414ef637 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -295,3 +295,12 @@ intersphinx_mapping = {
 # ------------------------------------
 
 hoverxref_auto_ref = True
+hoverxref_project = "scrapy"
+hoverxref_version = release
+hoverxref_role_types = {
+    "class": "tooltip",
+    "confval": "tooltip",
+    "hoverxref": "tooltip",
+    "mod": "tooltip",
+    "ref": "tooltip",
+}
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 773b92cea..3d34b47da 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-Sphinx>=2.1
-sphinx-hoverxref
-sphinx-notfound-page
-sphinx_rtd_theme
+Sphinx>=3.0
+sphinx-hoverxref>=0.2b1
+sphinx-notfound-page>=0.4
+sphinx_rtd_theme>=0.4
diff --git a/docs/topics/downloader-middleware.rst b/docs/topics/downloader-middleware.rst
index 73648994d..8d3ea51f3 100644
--- a/docs/topics/downloader-middleware.rst
+++ b/docs/topics/downloader-middleware.rst
@@ -829,6 +829,7 @@ REDIRECT_MAX_TIMES
 Default: ``20``
 
 The maximum number of redirections that will be followed for a single request.
+After this maximum, the request's response is returned as is.
 
 MetaRefreshMiddleware
 ---------------------
diff --git a/docs/topics/settings.rst b/docs/topics/settings.rst
index dc6843d75..90df9a02e 100644
--- a/docs/topics/settings.rst
+++ b/docs/topics/settings.rst
@@ -1116,17 +1116,6 @@ multi-purpose thread pool used by various Scrapy components. Threaded
 DNS Resolver, BlockingFeedStorage, S3FilesStore just to name a few. Increase
 this value if you're experiencing problems with insufficient blocking IO.
 
-.. setting:: REDIRECT_MAX_TIMES
-
-REDIRECT_MAX_TIMES
-------------------
-
-Default: ``20``
-
-Defines the maximum times a request can be redirected. After this maximum the
-request's response is returned as is. We used Firefox default value for the
-same task.
-
 .. setting:: REDIRECT_PRIORITY_ADJUST
 
 REDIRECT_PRIORITY_ADJUST
@@ -1422,17 +1411,6 @@ Default: ``True``
 A boolean which specifies if the :ref:`telnet console <topics-telnetconsole>`
 will be enabled (provided its extension is also enabled).
 
-.. setting:: TELNETCONSOLE_PORT
-
-TELNETCONSOLE_PORT
-------------------
-
-Default: ``[6023, 6073]``
-
-The port range to use for the telnet console. If set to ``None`` or ``0``, a
-dynamically assigned port is used. For more info see
-:ref:`topics-telnetconsole`.
-
 .. setting:: TEMPLATES_DIR
 
 TEMPLATES_DIR