Qeole / Enlight

Firefox add-on providing syntax highlighting for raw code, based on the highlight.js project.

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Add-on icon Enlight

Enlight is a Firefox add-on providing syntax highlighting for raw source code files, based on the highlight.js project.

Syntax highlighting relies on the highlight.js library (see project homepage). Currently packaged with the add-on is the version 11.0.1 of highlight.js, which provides 242 color themes and syntax for 191 languages.

Install

▶▶▶ Get it from Mozilla add-ons platform! ◀◀◀

As a general rule, it is no longer possible to manually install the version provided here with the vanilla Firefox release. See Mozilla policy on add-ons signature for details. On some specific Firefox versions where add-on signing has been disabled (Developer Edition or Nightly with the option manually deactivated, or on special stable releases), it may be possible to use a version of the add-on coming from this repository (see also Mozilla's wiki).

If you run one of those specific versions and want to run or build the add-on, use the web-ext tool. To test it with a temporary Firefox profile, use:

web-ext run

Or to compile an add-on .zip file, use instead:

web-ext build

See the documentation for web-ext tool if you need more information about the available commands and options.

Usage

Basics

On install, a new button with a light bulb button should appear in Firefox toolbar.

To highlight raw source code in the active tab, click on this button and select the language syntax you want to use (or “Autodetect” for automatic detection). If you want to undo highlighting, just click again on the button. Reloading the page also works.

Options

You can also customize some options through Firefox add-on manager tab:

  • Color theme selection (default: Solarized Dark): change the CSS theme in use for syntax highlight.
  • Automatic highlighting (default: off): check it to automatically trigger syntax highlighting for all plain text files.
  • Add line numbers (default: off): add line numbers on the left of file content. Line numbers are created with CSS and are not part of the file contents.
  • Set the width for tab characters (default: 8-space long): choose a size for displaying tabulation characters.
  • Select the programming languages to use in the add-on pop-up and for auto-detection. Using many languages tends to slow down auto-detection and to make it less accurate. Defaults to the list of “common” languages as offered by the highlight.js library on its download page.

When line numbering is enabled, it is possible to jump to the line passed through URL: e.g. scroll to line 27 and select it if a suffix such as #Line27 or #line27 or #L27 or #l27 is appended to the URL before the script loads (this does not relies on HTML anchors and cannot be triggered by simple URL modification; reload syntax highlighting for current page if you added the suffix afterward).

New languages, color schemes

Enlight relies on highlight.js library for coloring the code. It does not modify this library, nor does it add support for additional languages or color schemes. Therefore, fixes for language syntax and auto-detection accuracy, suggestions or contributions to new languages and styles should be addressed to the highlight.js project community.

License

The code relative to the add-on itself is placed under the Mozilla Public License v. 2.0 (see file LICENSE).

The code for highlight.js (i.e. everything under the hljs directory) was released under the BSD License (see relative LICENSE file for details).

Miscellaneous

Other than on the highlight.js homesite, you can find a list of supported languages in options/list-languages.js, and of available color schemes in options/list-styles.js.

About

Firefox add-on providing syntax highlighting for raw code, based on the highlight.js project.

License:Mozilla Public License 2.0


Languages

Language:CSS 92.3%Language:JavaScript 6.7%Language:HTML 0.5%Language:Makefile 0.5%