Source Code & Font Viewer — HTML/CSS/JS/JSON/XML Firefox

Download Source Code & Font Viewer — HTML/CSS/JS/JSON/XML

By: Nicolas Dos Santos Add-on
Download Source Code & Font Viewer — HTML/CSS/JS/JSON/XML (current and past versions) for Firefox
Latest Version: 1.7.0 Updated: 3 days ago

Ready to install?

Source Code & Font Viewer — HTML/CSS/JS/JSON/XML is available to install from Firefox Add-ons Store and for download from this page.
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Available versions

You can find the current and older versions of Source Code & Font Viewer — HTML/CSS/JS/JSON/XML here. You can download the archived versions or inspect their source codes.

As a free user, you can download up to 3 latest versions.
Upgrade to download older versions
VersionDownloadSizeDownload countTimestamp
1.7.0XPI · ZIP · Source code501.32KB02026-07-24
1.6.1XPI · ZIP · Source code481.28KB02026-07-22
1.6.0XPI · ZIP · Source code480.30KB02026-07-20
1.5.0Paid users only154.24KB02026-07-18
1.4.0Paid users only143.19KB02026-07-17
1.3.0Paid users only150.18KB02026-06-30
1.2.0Paid users only105.52KB02026-05-13
1.1.0Paid users only103.08KB02026-05-07
1.7.0 501.32KB
2026-07-24 · 0 downloads
XPI ZIP Source code
1.6.1 481.28KB
2026-07-22 · 0 downloads
XPI ZIP Source code
1.6.0 480.30KB
2026-07-20 · 0 downloads
XPI ZIP Source code
1.5.0 154.24KB
2026-07-18 · 0 downloads
Paid users only
1.4.0 143.19KB
2026-07-17 · 0 downloads
Paid users only
1.3.0 150.18KB
2026-06-30 · 0 downloads
Paid users only
1.2.0 105.52KB
2026-05-13 · 0 downloads
Paid users only
1.1.0 103.08KB
2026-05-07 · 0 downloads
Paid users only

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.
  • Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  • Download the Source Code & Font Viewer — HTML/CSS/JS/JSON/XML ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the Source Code & Font Viewer — HTML/CSS/JS/JSON/XML ZIP file from step 1. Source Code & Font Viewer — HTML/CSS/JS/JSON/XML is now installed on your browser.

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