You can modify the shortcut by opening the following URL: chrome://extensions/shortcuts
You can Follow the below Step By Step procedure to install the Switch Last Tabs Chrome Extension to your Chrome Web browser.
It is the Switch Last Tabs Chrome extension download link you can download and install Chrome Browser.
Cycle through last used Chrome tabs using 'key'board shortcut (Alt+Q).
Add 'key'board shortcuts to switch tabs with a Quicksilver-style search or a most recently used menu
Cycle through last used Chrome tabs using 'key'board shortcut.
Use Ctrl+Tab to switch between tabs in MRU order, with optional thumbnail previews.
Toggles between the last two active tabs using a global hot'key'.
Provides a menu with your previous tabs in order of access - never loose track of you last tab again!
Use the back 'key' to close the tab if there are no pages to go back to. When it closes, go to the tab that created it.
The easiest way to switch tabs on Google Chrome.
A 'key'board centric most recently used (MRU) ordered page list plugin with seek and switch functionality inspired by IntelliJ IDEA
The Next Generation Session Manager; A Really Working Too Many Open Tabs Solution; And Your Browsing Notebook.