html
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HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon
For Firefox 56, use 0.974 (see all versions below).
For Firefox 57, see Web Extensions.
6,480
4.23 
(26)
(26)
Automatically redirects AMP pages to the regular web page variant.
4,960
4.58 (113)
(113)
Save an entire web page—including images and styling—as a single HTML file.
86,761
4.76 (1,023)
(1,023)
Scrape HTML Table Data to Clipboard or Save-to-File in either CSV or TAB delimited with options
938
5.00 (4)
(4)
Copy HTML source text. Keyboard shortcut F8.
526
4.80 (10)
(10)
Open SWF links of Adobe Animate (Flash) in a pure sandboxed JavaScript emulator
4,155
3.89 (18)
(18)
Download as a single html file for the current page with images and styles.
554
3.33 (3)
(3)
Auto Save HTML is a small extension which can be used to automatically download the HTML document(s) of a specified website when browsing that same website.
257
4.11 (9)
(9)
This extension will allow you to easily insert HTML code into the body of the message from your favorite webmail service: Gmail, Outlook, and Yahoo Mail.
1,024
5.00 (5)
(5)
Save the title and URLs of open tabs as an HTML file.
301
4.46 (13)
(13)
Easily remove desired HTML5 elements with just one click!
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3.87 (23)
(23)
Insert HTML content into Gmail composer
326
0.00 (0)
(0)
WebStudio, a HTML editor online to create and edit any webpage using a web browser.
600
3.00 (22)
(22)
Blocks desired HTML contents (script, style, image, object, media)
212
3.46 (26)
(26)
Control the speed of HTML websites with various timing methods.
436
4.67 (9)
(9) Renders some rss feeds as html
118
5.00 (5)
(5)
Take a full page screenshot and save it as an offline HTML file.
421
3.43 (7)
(7)
Disable autoplay and preloading of HTML5 video and audio players.
7,460
3.10 (321)
(321)
Extract HTML & CSS from any element with live preview, smart selector simplification, and syntax-highlighted editor
112
3.00 (2)
(2)
Automatically enables video controls when playing html webm videos.
5,801
4.06 (51)
(51)
Run HTML, CSS, and JavaScript instantly in a new tab — no server, no build, no setup.
50
1.00 (1)
(1)
This extension shows information about a web page's HTML elements as you hover over them. The details are displayed in a text stripe at the top of the screen. Clicking on the text stripe will toggle it between top and bottom placement.
157
4.00 (4)
(4)
Simple button to open html file. Allow you to open local HTML page file on Android. You can choose multiply files at once. Add the extension page to your "Bookmarks" menu to open the page more convenient.
230
4.00 (3)
(3)
Easily Remove HTML elements by clicking them
130
5.00 (1)
(1) Adds DuckDuckGo HTML as a search engine for a non-JavaScript experience
247
5.00 (1)
(1)250 results. Page 1 of 10.