downgrade-versions
-e Downgrading can be used for several exploits, to get to a version that does not have patches for certain exploits, such as LTBEEF. This is a built-in feature of ChromeOS. Please do note that downgrading on most devices up to a certain version is patched so this may not work for you.
Requirements:
- A USB thumb drive with at least 4GB of storage - 16GB is recommended.
- A personal computer with access to downloading extensions.
Setup:
- Navigate to chrome://version on the Chromebook you wish to downgrade and check for your board under Platform.
- On your personal computer, navigate to https://chrome100.dev.
- Do CTRL+F on your keyboard and type in your board.
- Find and download the Chrome version you want to your personal computer.
Downgrading:
- Install Chromebook Recovery Utility onto your personal computer. (https://chrome.google.com/webstore/detail/chromebook-recovery-utili/pocpnlppkickgojjlmhdmidojbmbodfm)
- Open the extension, click on the settings button in the top right-hand corner, and click “Use local image”.
- Select the recovery image you downloaded from chrome100.
- Plug in the USB you wish to use, and follow the prompts on the screen.
- On your Chromebook, press Esc+Reload+Power and follow the prompts.
- On the checking for updates screen, press Ctrl+Shift+E to skip it.
Credits: https://github.com/3kh0/ext-remover