+## When to use Chromium's low-end device mode. This improves the RAM
+## usage of renderer processes, at the expense of performance.
+## Type: String
+## Valid values:
+## - always: Always use low-end device mode.
+## - auto: Decide automatically (uses low-end mode with < 1 GB available RAM).
+## - never: Never use low-end device mode.
+# c.qt.low_end_device_mode = 'auto'
+
+## Which Chromium process model to use. Alternative process models use
+## less resources, but decrease security and robustness. See the
+## following pages for more details: -
+## https://www.chromium.org/developers/design-documents/process-models
+## - https://doc.qt.io/qt-5/qtwebengine-features.html#process-models
+## Type: String
+## Valid values:
+## - process-per-site-instance: Pages from separate sites are put into separate processes and separate visits to the same site are also isolated.
+## - process-per-site: Pages from separate sites are put into separate processes. Unlike Process per Site Instance, all visits to the same site will share an OS process. The benefit of this model is reduced memory consumption, because more web pages will share processes. The drawbacks include reduced security, robustness, and responsiveness.
+## - single-process: Run all tabs in a single process. This should be used for debugging purposes only, and it disables `:open --private`.
+# c.qt.process_model = 'process-per-site-instance'
+
+## When to show the scrollbar.
+## Type: String
+## Valid values:
+## - always: Always show the scrollbar.
+## - never: Never show the scrollbar.
+## - when-searching: Show the scrollbar when searching for text in the webpage. With the QtWebKit backend, this is equal to `never`.
+c.scrolling.bar = 'never'