⚡ Legacy Technologies in Bulgaria

Legacy technologies are platforms and tools that have been discontinued or shut down and no longer operate. Some are completely defunct, while others remain functional but unsupported.

Bulgaria is a Southeastern European country with a population of around 6.5 million people.

According to our data, legacy technologies are detected on 28.7% of websites from Bulgaria.

Statistics based on 13K+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the top legacy technologies in Bulgaria in 2026, based on market share.

The most popular is Owl Carousel with an impressive share of 31.3%, followed by Magnific Popup with 21.4% and jQuery Cookie with 10.3%.

Owl Carousel 31.3%
Magnific Popup 21.4%
jQuery Cookie 10.3%
Google URL Shortener 9.1%
jQuery Mousewheel 8.8%
Facebook Like 7.2%
Adobe Flash 5.7%
Moment.js 4.6%
Messenger Customer Chat 3.9%
Facebook Like Box 3.5%
AddThis 3.4%
CentOS 3%
SWFObject 2.7%
Google Webmaster Tools 2.6%
Skype 2.6%

🚀 Highlights

Here is a list of the top technologies that are more popular in Bulgaria than worldwide.
Differences between global and country rankings are shown in parentheses.

3. jQuery Cookie ^(-1)
6. Facebook Like ^(-2)
9. Messenger Customer Chat ^(-8)
10. Facebook Like Box ^(-13)
12. CentOS ^(-1)
13. SWFObject ^(-8)
14. Google Webmaster Tools ^(-6)
15. Skype ^(-3)
19. Google Funding Choices ^(-3)
21. Closure Library ^(-7)

✨ Best Legacy Technologies

Below is a more detailed list of the top 25 of the 75 legacy technologies used on sites from Bulgaria, ranked by their market share.

Rank	Name	Market share
1	Owl Carousel Germany A deprecated open-source jQuery plugin for creating responsive, touch-enabled, and accessible carousel sliders. FreeOpen sourceLegacy	31.3%
2	Magnific Popup A responsive lightbox and dialog plugin for jQuery and Zepto.js. FreeOpen sourceLegacy	21.4%
3	jQuery Cookie A deprecated jQuery plugin for reading, writing and deleting cookies. FreeOpen sourceLegacy	10.3%
4	Google URL Shortener Mountain View, California, United States A deprecated link service from Google. Legacy	9.1%
5	jQuery Mousewheel A jQuery plugin that adds cross-browser mouse wheel support. FreeOpen sourceLegacy	8.8%
6	Facebook Like Menlo Park, California, United States A social plugin that allowed websites to embed a button for visitors to like and share web pages on Facebook. Legacy	7.2%
7	Adobe Flash San Jose, California, United States A discontinued multimedia software platform for creating animations and interactive apps. Legacy	5.7%
8	Moment.js San Francisco, California, United States An open-source JavaScript library for parsing, validating, manipulating, and formatting dates. FreeOpen sourceLegacy	4.6%
9	Messenger Customer Chat Menlo Park, California, United States The website chat widget from Meta that was retired in May 2024. Legacy	3.9%
10	Facebook Like Box Menlo Park, California, United States A plugin that allowed admins to promote their Facebook Pages and embed a simple feed of content from a Page into other sites. Legacy	3.5%
11	AddThis Austin, Texas, United States A social bookmarking service that discontinued its services on May 31, 2023. FreeLegacy	3.4%
12	CentOS Raleigh, North Carolina, United States A discontinued open-source Linux distribution compatible with RHEL. Legacy	3%
13	SWFObject A deprecated framework for detecting the Adobe Flash Player plugin and embedding Flash files. FreeOpen sourceLegacy	2.7%
14	Google Webmaster Tools Mountain View, California, United States The old Google Webmaster Tools, detected by the meta name "verify-v1", which have been deprecated in favor of Google Search Console. FreeLegacy	2.6%
15	Skype Redmond, Washington, United States A communications platform for voice and video calls and sending instant messages that was retired on May 5, 2025 in favor of Microsoft Teams. FreeLegacy	2.6%
16	iLightBox A commercial jQuery lightbox plugin. $16+Legacy	1.9%
17	Skrollr Standalone parallax scrolling JavaScript library for mobile (Android, iOS) and desktop in about 12k minified. FreeOpen sourceLegacy	1.8%
18	jQuery LazyLoad A deprecated jQuery lazy loading plugin. FreeOpen sourceLegacy	1.7%
19	Google Funding Choices Mountain View, California, United States A messaging tool for GDPR and CCPA compliance and ad blocking recovery. Legacy	1.4%
20	Picturefill A responsive image polyfill for <picture>, srcset, sizes, and more. FreeOpen sourceLegacy	1.2%
21	Closure Library Mountain View, California, United States A low-level JavaScript library designed for building complex and scalable web applications. FreeOpen sourceLegacy	1%
22	AngularJS Mountain View, California, United States A discontinued open-source web framework from Google that has been superseded by Angular. FreeOpen sourceLegacy	0.9%
23	Google Sign-In Mountain View, California, United States A deprecated JavaScript library that has been superseded by Google Identity services for Web. FreeLegacy	0.9%
24	Alexa Seattle, Washington, United States A web traffic analysis service from Amazon that was discontinued in 2022. Legacy	0.8%
25	Cufon A discontinued JavaScript library that performs text replacement on web pages, using the canvas element and VML to render fancy fonts. FreeOpen sourceLegacy	0.8%

👉 See Also

🌎 Legacy in other countries

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 13,706 websites from Bulgaria.
We currently track the presence of 124 legacy technologies across the web.
Of these, 75 were detected on websites from Bulgaria.
Statistics were last calculated on August 4, 2026.
For more details, see our methodology and disclaimer.