This saves all currently open tabs as HTML, similar to the Netscape bookmark format.
https://addons.mozilla.org/en-US/firefox/addon/save-tabs-to-html-file/
https://chrome.google.com/webstore/detail/save-tabs-as-html/dmnhgbenglfffoaodbgpfoihfnbdbfcb
The idea is to turn browser tabs into an HTML document that looks something like this:
- 7 tabs
- User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0
- Date: Mon Oct 14 2019 20:08:24 GMT-0400 (Eastern Daylight Time)
- ISO date: 2019-10-15T00:08:24.823Z
- Locale date: 10/14/2019, 8:08:24 PM
- JSON date: 2019-10-15T00:08:24.823Z
- YYYY-MM-DD (local): 2019-10-14
- Milliseconds since Unix epoch: 1571098104823
- Task Manager
- about:performance
- <dl>: The Description List element - HTML: Hypertext Markup Language | MDN
- https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dl
- about:debugging - Firefox Developer Tools | MDN
- https://developer.mozilla.org/en-US/docs/Tools/about:debugging
- <title>: The Document Title element - HTML: Hypertext Markup Language | MDN
- https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title
- tabs.Tab - Mozilla | MDN
- https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/Tab
- الشرق الأوسط | ara.reuters.com
- https://ara.reuters.com/news/topNews
- 首页 | 路透中文网
- https://cn.reuters.com/
Here's an example of actual output (reformatted for readability):
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>7 browser tabs</title>
<meta charset="utf-8" />
</head>
<body>
<ul>
<li>7 tabs</li>
<li>User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0</li>
<li>Date: Mon Oct 14 2019 20:08:24 GMT-0400 (Eastern Daylight Time)</li>
<li>ISO date: 2019-10-15T00:08:24.823Z</li>
<li>Locale date: 10/14/2019, 8:08:24 PM</li>
<li>JSON date: 2019-10-15T00:08:24.823Z</li>
<li>YYYY-MM-DD (local): 2019-10-14</li>
<li>Milliseconds since Unix epoch: 1571098104823</li>
</ul>
<dl>
<dt>
<a href="about:performance">Task Manager</a>
</dt>
<dd>
<a href="about:performance">about:performance</a>
</dd>
<dt>
<a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dl"><dl>: The Description List element - HTML: Hypertext Markup Language | MDN</a>
</dt>
<dd>
<a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dl">https://developer.mozilla.org/en-US/docs/Web/HTML/Element/dl</a>
</dd>
<dt>
<a href="https://developer.mozilla.org/en-US/docs/Tools/about:debugging">about:debugging - Firefox Developer Tools | MDN</a>
</dt>
<dd>
<a href="https://developer.mozilla.org/en-US/docs/Tools/about:debugging">https://developer.mozilla.org/en-US/docs/Tools/about:debugging</a>
</dd>
<dt>
<a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title"><title>: The Document Title element - HTML: Hypertext Markup Language | MDN</a>
</dt>
<dd>
<a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title">https://developer.mozilla.org/en-US/docs/Web/HTML/Element/title</a>
</dd>
<dt>
<a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/Tab">tabs.Tab - Mozilla | MDN</a>
</dt>
<dd>
<a href="https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/Tab">https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/tabs/Tab</a>
</dd>
<dt>
<a href="https://ara.reuters.com/news/topNews">الشرق الأوسط | ara.reuters.com</a>
</dt>
<dd>
<a href="https://ara.reuters.com/news/topNews">https://ara.reuters.com/news/topNews</a>
</dd>
<dt>
<a href="https://cn.reuters.com/">首页 | 路透中文网</a>
</dt>
<dd>
<a href="https://cn.reuters.com/">https://cn.reuters.com/</a>
</dd>
</dl>
</body>
</html>