Not rendering local .md file

[AndreyOrb]

Hi,

After installing the extension and enabling access to local files, local .md files are rendered correctly.

I also associated *.md files with Chrome so I can open them by double-clicking.

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Steps to reproduce

1. Install the extension
2. Enable Allow access to file URLs
3. Associate .md files with Chrome
4. Close all Chrome windows
5. Double-click a .md file

---

Expected behavior

The Markdown file should be rendered automatically.

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Actual behavior

Chrome opens, but the file is displayed as raw Markdown (not rendered).

If Chrome is already open, double-clicking the same file works correctly and renders as expected.

To fix it temporarily, I have to:

• Open the extension options
• Click Render

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Errors (DevTools / Service Worker)

Error handling response: TypeError: Cannot read properties of undefined (reading 'file:///')
    at detect (chrome-extension://ckkdlimhmcjmikdlpkmbgfkaikojcbjk/background/detect.js:85:20)
    at chrome-extension://ckkdlimhmcjmikdlpkmbgfkaikojcbjk/background/detect.js:67:15

Uncaught TypeError: Cannot read properties of undefined (reading 'icon')
    at icon.js:7:46
    at Array.reduce (<anonymous>)
    at icon.js:6:35

index.js:1 Uncaught (in promise) Error: Could not establish connection. Receiving end does not exist.

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What I tried

1. Reinstalling the extension
2. Verifying that Safe Browsing is set to Standard
3. Clicking the Defaults button (based on issue Not rendering local .md file despite allowing file:///* URLs and local file URLs #131)

[simov]

Let me check if I understand the issue correctly - the file is not rendered only when clicking on a markdown file, but the Chrome window was not opened prior that? Did you try refreshing the page in your browser after the initial load?

[AndreyOrb]

Yes, that’s correct — the issue happens only when Chrome is not already running.

Let me describe it step by step from a clean state:

1. I uninstall the extension and install it again from the Chrome Store.

2. I open a .md file (associated with Chrome). It opens as raw Markdown — this is expected since the extension is not configured yet.

3. I go to Markdown Viewer → Options → Allow access, which opens the Chrome extension settings.

4. I enable “Allow access to file URLs”. I can then see file:// permissions added in the options page.

5. I click the Markdown button in the extension popup.
   → The current .md file is now rendered correctly.

6. While Chrome remains open, everything works as expected:

   • Opening any .md file renders it automatically

7. However, after I close Chrome completely and then:

   • Double-click a .md file

   → Chrome opens, but the file is shown as raw Markdown (not rendered)

Additional notes:

• Refreshing the page (F5 or Ctrl+F5) does not fix the issue

• The only workaround is:

  • Open the extension popup
  • Click the Markdown button again
    → After that, rendering works again until the next browser restart

[TomBraider42]

Similar problem. The following file (from https://crates.io/crates/coreutils) isn't rendering.
There are no errors in the console.

Workaround: Delete the first few lines, including the two DIV tags.

<!-- markdownlint-disable MD033 MD041 MD002 -->
<!-- markdownlint-disable commands-show-output no-duplicate-heading -->
<!-- spell-checker:ignore markdownlint ; (options) DESTDIR UTILNAME manpages reimplementation oranda -->
<div class="oranda-hide">
<div align="center">

![uutils logo](docs/src/logo.svg)

# uutils coreutils

[![Crates.io](https://img.shields.io/crates/v/coreutils.svg)](https://crates.io/crates/coreutils)
[![Discord](https://img.shields.io/badge/discord-join-7289DA.svg?logo=discord&longCache=true&style=flat)](https://discord.gg/wQVJbvJ)
[![License](http://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/uutils/coreutils/blob/main/LICENSE)
[![dependency status](https://deps.rs/repo/github/uutils/coreutils/status.svg)](https://deps.rs/repo/github/uutils/coreutils)

[![CodeCov](https://codecov.io/gh/uutils/coreutils/branch/master/graph/badge.svg)](https://codecov.io/gh/uutils/coreutils)

</div>

---

</div>

This package is part of uutils coreutils.

uutils coreutils is a cross-platform reimplementation of the GNU coreutils in
[Rust](http://www.rust-lang.org).

This package does not have its specific `README.md`.