diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 000000000..65608537d
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,186 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Python",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "${file}",
+            "cwd": "${workspaceFolder}",
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput"
+            ]
+        },
+        {
+            "name": "Python: Attach",
+            "type": "python",
+            "request": "attach",
+            "localRoot": "${workspaceFolder}",
+            "remoteRoot": "${workspaceFolder}",
+            "port": 3000,
+            "secret": "my_secret",
+            "host": "localhost"
+        },
+        {
+            "name": "Python: Terminal (integrated)",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "${file}",
+            "cwd": "",
+            "console": "integratedTerminal",
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": []
+        },
+        {
+            "name": "Python: Terminal (external)",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "${file}",
+            "cwd": "",
+            "console": "externalTerminal",
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": []
+        },
+        {
+            "name": "Python: Django",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "${workspaceFolder}/manage.py",
+            "cwd": "${workspaceFolder}",
+            "args": [
+                "runserver",
+                "--noreload",
+                "--nothreading"
+            ],
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput",
+                "DjangoDebugging"
+            ]
+        },
+        {
+            "name": "Python: Flask (0.11.x or later)",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": false,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "fully qualified path fo 'flask' executable. Generally located along with python interpreter",
+            "cwd": "${workspaceFolder}",
+            "env": {
+                "FLASK_APP": "${workspaceFolder}/quickstart/app.py"
+            },
+            "args": [
+                "run",
+                "--no-debugger",
+                "--no-reload"
+            ],
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput"
+            ]
+        },
+        {
+            "name": "Python: Flask (0.10.x or earlier)",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": false,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "${workspaceFolder}/run.py",
+            "cwd": "${workspaceFolder}",
+            "args": [],
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput"
+            ]
+        },
+        {
+            "name": "Python: PySpark",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "osx": {
+                "pythonPath": "${env:SPARK_HOME}/bin/spark-submit"
+            },
+            "windows": {
+                "pythonPath": "${env:SPARK_HOME}/bin/spark-submit.cmd"
+            },
+            "linux": {
+                "pythonPath": "${env:SPARK_HOME}/bin/spark-submit"
+            },
+            "program": "${file}",
+            "cwd": "${workspaceFolder}",
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput"
+            ]
+        },
+        {
+            "name": "Python: Module",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "module": "module.name",
+            "cwd": "${workspaceFolder}",
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput"
+            ]
+        },
+        {
+            "name": "Python: Pyramid",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "cwd": "${workspaceFolder}",
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "args": [
+                "${workspaceFolder}/development.ini"
+            ],
+            "debugOptions": [
+                "RedirectOutput",
+                "Pyramid"
+            ]
+        },
+        {
+            "name": "Python: Watson",
+            "type": "python",
+            "request": "launch",
+            "stopOnEntry": true,
+            "pythonPath": "${config:python.pythonPath}",
+            "program": "${workspaceFolder}/console.py",
+            "cwd": "${workspaceFolder}",
+            "args": [
+                "dev",
+                "runserver",
+                "--noreload=True"
+            ],
+            "env": {},
+            "envFile": "${workspaceFolder}/.env",
+            "debugOptions": [
+                "RedirectOutput"
+            ]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 000000000..a3e76b466
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "python.pythonPath": "${workspaceFolder}/.venv/bin/python"
+}
\ No newline at end of file
diff --git a/qutebrowser/config/configdata.yml b/qutebrowser/config/configdata.yml
index a118a8b59..a3ae79e2d 100644
--- a/qutebrowser/config/configdata.yml
+++ b/qutebrowser/config/configdata.yml
@@ -740,6 +740,11 @@ completion.use_best_match:
   default: false
   desc: Execute the best-matching command on a partial match.
 
+completion.exit_prefix:
+  type: Bool
+  default: false
+  desc: Exit command mode if the prefix gets deleted.
+
 ## downloads
 
 downloads.location.directory:
@@ -2493,4 +2498,4 @@ bindings.commands:
       keyboard.
 
     * register: Entered when qutebrowser is waiting for a register name/key for
-      commands like `:set-mark`.
+      commands like `:set-mark`.
\ No newline at end of file
diff --git a/qutebrowser/mainwindow/statusbar/command.py b/qutebrowser/mainwindow/statusbar/command.py
index ab8ac7b5d..4611a186c 100644
--- a/qutebrowser/mainwindow/statusbar/command.py
+++ b/qutebrowser/mainwindow/statusbar/command.py
@@ -31,7 +31,6 @@ from qutebrowser.config import config
 
 
 class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
-
     """The commandline part of the statusbar.
 
     Attributes:
@@ -55,6 +54,8 @@ class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
     show_cmd = pyqtSignal()
     hide_cmd = pyqtSignal()
 
+    prefixes = '/ : ?'
+
     def __init__(self, *, win_id, private, parent=None):
         misc.CommandLineEdit.__init__(self, parent=parent)
         misc.MinimalLineEditMixin.__init__(self)
@@ -68,6 +69,7 @@ class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
         self.textChanged.connect(self.update_completion)
         self.textChanged.connect(self.updateGeometry)
         self.textChanged.connect(self._incremental_search)
+        self.textChanged.connect(self._exit_prefix)
 
     def prefix(self):
         """Get the currently entered command prefix."""
@@ -219,7 +221,10 @@ class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
         if not text:
             pass
         elif text[0] in modeparsers.STARTCHARS:
-            super().set_prompt(text[0])
+            if config.val.completion.exit_prefix:
+                super().set_prompt('')
+            else:
+                super().set_prompt(text[0])
         else:
             raise utils.Unreachable("setText got called with invalid text "
                                     "'{}'!".format(text))
@@ -259,3 +264,10 @@ class Command(misc.MinimalLineEditMixin, misc.CommandLineEdit):
 
         if self.prefix() in ['/', '?']:
             self.got_cmd[str].emit(search_prefixes[text[0]] + text[1:])
+
+    @pyqtSlot(str)
+    def _exit_prefix(self, text):
+        if config.val.completion.exit_prefix and
+        (not text or text[0] not in self.prefixes):
+            modeman.leave(self._win_id, usertypes.KeyMode.command,
+                          'prefix deleted', maybe=True)