A chromium extension for moving tabs with key commands

background.js

chrome.commands.onCommand.addListener(cmd => {
    chrome.tabs.query({ currentWindow:true, active:true }, tabs => {
        const tab = tabs[0];
        if (!tab) return;
        switch (cmd) {
            case 'move-left': chrome.tabs.move(tab.id, { index:Math.max(0, tab.index-1) }); break;
            case 'move-right': chrome.tabs.move(tab.id, { index:tab.index+1 }); break;
            case 'move-to-first': chrome.tabs.move(tab.id, { index:0 }); break;
            case 'move-to-last': chrome.tabs.move(tab.id, { index:-1 }); break;
            case 'move-next-window': tabMoveWindow(tab, 1); break;
            case 'move-prev-window': tabMoveWindow(tab, -1); break;
        }
    });
});

function tabMoveWindow(tab, dir) {
    chrome.windows.getAll(wins => {
        if (wins.length <= 1)
            chrome.windows.create({ tabId:tab.id });
        else
            for (let i = 0; i < wins.length; i++)
                if (tab.windowId === wins[i].id)
                    return chrome.tabs.move(tab.id, { windowId: wins[(i + dir + wins.length) % wins.length].id, index:-1 }, newTab => {
                        chrome.tabs.highlight({ windowId:newTab.windowId, tabs:[newTab.index] }, () => {
                            chrome.windows.update(newTab.windowId, { focused:true });
                        });
                    });
    });
}

manifest.json

{
    "name": "Move tabs",
    "version": "1.0",
    "description": "Use commands to move tabs",
    "permissions": ["tabs"],
    "background": {
        "scripts": ["background.js"],
        "persistent": false
    },
    "commands": {
        "move-to-first": {
            "suggested_key": {
                "default": "Alt+K"
            },
            "description": "Move current tab leftmost"
        },
        "move-to-last": {
            "suggested_key": {
                "default": "Alt+J"
            },
            "description": "Move current tab rightmost"
        },
        "move-left": {
            "suggested_key": {
                "default": "Alt+H"
            },
            "description": "Move current tab left"
        },
        "move-right": {
            "suggested_key": {
                "default": "Alt+L"
            },
            "description": "Move current tab right"
        },
        "move-next-window": {
            "description": "Move current tab to the next window"
        },
        "move-prev-window": {
            "description": "Move current tab to the previous window"
        }
    },
    "manifest_version": 2
}

How to use:

• Put both files in a folder.
• Open any Chromium based browser and go to chrome://extensions.
• Activate 'developer mode' and find the button to 'load unpacked'.
• Click it and select the folder you put the files in.
• Extension should now be loaded. Go to browser settings > extensions > Move Tabs, and change the key bindings to your liking.

Updated:

• If only one window exists and move-next/prev-window is pressed, a new window will be created and the tab moved there.