UpOne

A minimal Chrome (Manifest V3) extension that navigates up one level in the URL hierarchy of the active tab.

Usage

Press Alt+Up in any tab (configurable in chrome://extensions/shortcuts), or click the toolbar icon.

In a single press:

1. Query string (?...) and fragment (#...) are removed.
2. The last path segment is removed.
3. Once the new page finishes loading, UpOne triggers a hard refresh (bypassCache: true) so the target page is fetched fresh from the server rather than served from Chrome's cache.

The extension does not filter by scheme -- it tries on whatever the active tab is. Chrome itself refuses navigation on schemes where it is not appropriate.

Examples

From	To
https://example.com/a/b/c?q=1#x	https://example.com/a/b/
https://example.com/a/b/	https://example.com/a/
https://example.com/a/	https://example.com/
https://example.com/	no change (nothing to strip)
file:///C:/foo/bar/x.md	file:///C:/foo/bar/
file:///C:/foo/bar/	file:///C:/foo/

Install (developer mode)

1. Open chrome://extensions/.
2. Enable Developer mode (top right).
3. Click Load unpacked and pick this directory.
4. Optionally rebind the shortcut in chrome://extensions/shortcuts.

file:// URL access

If Alt+Up does nothing on a file:// tab, open chrome://extensions/, click the UpOne card's Details button, and enable Allow access to file URLs. Chrome requires this per-extension opt-in before any extension can read or manipulate file:// tabs.

Directory listing sort (v1.4+)

When you view a file:///<dir>/ URL in Chrome, the browser renders a table listing of the folder contents. Out of the box Chrome sorts by Name ascending with no preference stored.

UpOne injects a content script on every file:// page that:

1. Bails unless the document title begins with Index of (the Chromium directory-listing marker).
2. Finds the <tbody> inside the listing table.
3. Locates the Date Modified column by header text (falls back to column index 2).
4. Reorders the rows by that column descending.

The [parent directory] link lives outside the table and is not touched. If you click the Name or Size header to re-sort, Chromium's built-in handler takes over and wins -- UpOne only sets the initial order.

Requires the same Allow access to file URLs toggle as the navigation feature; see above.

Files

File	Purpose
manifest.json	MV3 manifest; declares the go-up command, the content script, and file:///* host permission.
background.js	Service worker. Handles the keyboard command, toolbar click, and post-navigation hard refresh.
content.js	Content script. Sorts file:// directory listings by Date Modified descending.
icon16.png	16x16 toolbar icon -- capital U.