diff --git a/qutebrowser/browser/downloads.py b/qutebrowser/browser/downloads.py
index 1db71f935..6140ebc3d 100644
--- a/qutebrowser/browser/downloads.py
+++ b/qutebrowser/browser/downloads.py
@@ -303,6 +303,7 @@ class DownloadManager(QObject):
 
     @pyqtSlot()
     def on_finished(self):
+        """Remove finished download."""
         idx = self.downloads.index(self.sender())
         self.download_about_to_be_finished.emit(idx)
         del self.downloads[idx]
@@ -310,9 +311,11 @@ class DownloadManager(QObject):
 
     @pyqtSlot()
     def on_data_changed(self):
+        """Emit data_changed signal when download data changed."""
         idx = self.downloads.index(self.sender())
         self.data_changed.emit(idx)
 
     @pyqtSlot(str)
     def on_error(self, msg):
+        """Display error message on download errors."""
         message.error("Download error: {}".format(msg), queue=True)
diff --git a/qutebrowser/models/downloadmodel.py b/qutebrowser/models/downloadmodel.py
index 29fcef5e8..18fae8748 100644
--- a/qutebrowser/models/downloadmodel.py
+++ b/qutebrowser/models/downloadmodel.py
@@ -24,6 +24,12 @@ from PyQt5.QtWidgets import QApplication
 
 class DownloadModel(QAbstractListModel):
 
+    """Glue model to show downloads in a QListView.
+
+    Glue between qutebrowser.browser.download (DownloadManager) and
+    qutebrowser.widgets.download (DownloadView).
+    """
+
     def __init__(self, parent=None):
         super().__init__(parent)
         self.downloadmanager = QApplication.instance().downloadmanager
@@ -37,10 +43,12 @@ class DownloadModel(QAbstractListModel):
 
     @pyqtSlot(int)
     def on_data_changed(self, idx):
+        """Update view when DownloadManager data changed."""
         model_idx = self.index(idx, 0)
         self.dataChanged.emit(model_idx, model_idx)
 
     def headerData(self, section, orientation, role):
+        """Simple constant header."""
         if (section == 0 and orientation == Qt.Horizontal and
                 role == Qt.DisplayRole):
             return "Downloads"
@@ -48,6 +56,7 @@ class DownloadModel(QAbstractListModel):
             return ""
 
     def data(self, index, role):
+        """Download data from DownloadManager."""
         if not index.isValid():
             return QVariant()
         elif role != Qt.DisplayRole:
@@ -65,6 +74,7 @@ class DownloadModel(QAbstractListModel):
             return str(round(perc))  # FIXME
 
     def rowCount(self, parent):
+        """Get count of active downloads."""
         if parent.isValid():
             # We don't have children
             return 0
diff --git a/qutebrowser/widgets/downloads.py b/qutebrowser/widgets/downloads.py
index 23ca51879..61cb4765f 100644
--- a/qutebrowser/widgets/downloads.py
+++ b/qutebrowser/widgets/downloads.py
@@ -25,6 +25,8 @@ from qutebrowser.models.downloadmodel import DownloadModel
 
 class DownloadView(QListView):
 
+    """QListView which shows currently running downloads as a bar."""
+
     def __init__(self, parent=None):
         super().__init__(parent)
         self.setSizePolicy(QSizePolicy.MinimumExpanding, QSizePolicy.Fixed)
@@ -36,9 +38,11 @@ class DownloadView(QListView):
         self.setWrapping(True)
 
     def minimumSizeHint(self):
+        """Override minimumSizeHint so the size is correct in a layout."""
         return self.sizeHint()
 
     def sizeHint(self):
+        """Return sizeHint based on the view contents."""
         height = self.sizeHintForRow(0)
         if height != -1:
             return QSize(0, height + 2)