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updatecenter.norton.com screenshot

Report Summary

  • 66

    Performance

    Renders faster than
    79% of other websites

  • 92

    Accessibility

    Visual factors better than
    that of 80% of websites

  • 75

    Best Practices

    More advanced features
    available than in
    36% of websites

  • 50

    SEO

    Google-friendlier than
    18% of websites

updatecenter.norton.com

Norton Update Center

Page Load Speed

31 sec in total

First Response

15.4 sec

Resources Loaded

15.5 sec

Page Rendered

113 ms

updatecenter.norton.com screenshot

About Website

Visit updatecenter.norton.com now to see the best up-to-date Update Center Norton content for United States and also check out these interesting facts you probably never knew about updatecenter.norton.com

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Key Findings

We analyzed Updatecenter.norton.com page load time and found that the first response time was 15.4 sec and then it took 15.6 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

updatecenter.norton.com performance score

66

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value3.1 s

46/100

10%

LCP (Largest Contentful Paint)

Value4.6 s

34/100

25%

SI (Speed Index)

Value3.1 s

93/100

10%

TBT (Total Blocking Time)

Value390 ms

69/100

30%

CLS (Cumulative Layout Shift)

Value0

100/100

15%

TTI (Time to Interactive)

Value4.8 s

79/100

10%

Network Requests Diagram

updatecenter.norton.com

15377 ms

om_code_min.js

7 ms

s_code_min.js

10 ms

Common.css

88 ms

headerAndFooter.css

77 ms

Our browser made a total of 18 requests to load all elements on the main page. We found that 6% of them (1 request) were addressed to the original Updatecenter.norton.com, 67% (12 requests) were made to Static.nortoncdn.com and 11% (2 requests) were made to Nexus.ensighten.com. The less responsive or slowest element that took the longest time to load (15.4 sec) belongs to the original domain Updatecenter.norton.com.

Page Optimization Overview & Recommendations

Page size can be reduced by 158.4 kB (59%)

Content Size

267.7 kB

After Optimization

109.4 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Updatecenter.norton.com main page is 267.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 20% of websites need less resources to load. Javascripts take 156.3 kB which makes up the majority of the site volume.

HTML Optimization

-82%

Potential reduce by 18.7 kB

  • Original 22.7 kB
  • After minification 13.8 kB
  • After compression 4.0 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 8.9 kB, which is 39% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 18.7 kB or 82% of the original size.

Image Optimization

-33%

Potential reduce by 19.3 kB

  • Original 58.4 kB
  • After minification 39.1 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Update Center Norton needs image optimization as it can save up to 19.3 kB or 33% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-62%

Potential reduce by 96.5 kB

  • Original 156.3 kB
  • After minification 154.8 kB
  • After compression 59.8 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 96.5 kB or 62% of the original size.

CSS Optimization

-79%

Potential reduce by 23.9 kB

  • Original 30.4 kB
  • After minification 24.6 kB
  • After compression 6.5 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Updatecenter.norton.com needs all CSS files to be minified and compressed as it can save up to 23.9 kB or 79% of the original size.

Requests Breakdown

Number of requests can be reduced by 4 (24%)

Requests Now

17

After Optimization

13

  • Images
  • JavaScript
  • CSS

The browser has sent 17 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Update Center Norton. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 5 to 1 for JavaScripts and as a result speed up the page load time.

Network Requests Diagram

updatecenter.norton.com

updatecenter.norton.com

15377 ms

om_code_min.js

om_code_min.js

7 ms

s_code_min.js

s_code_min.js

10 ms

Common.css

Common.css

88 ms

headerAndFooter.css

headerAndFooter.css

77 ms

site.js

site.js

90 ms

arrows.png

arrows.png

9 ms

menu_bg.png

menu_bg.png

13 ms

sprite_gen4.png

sprite_gen4.png

19 ms

header_bottomline.png

header_bottomline.png

36 ms

banner-graphic.png

banner-graphic.png

17 ms

sprite_nuc.png

sprite_nuc.png

7 ms

arrows.png

arrows.png

6 ms

footer_logo.png

footer_logo.png

45 ms

ga.js

ga.js

45 ms

omnitags.js

omnitags.js

5 ms

s89978615380823

s89978615380823

29 ms

__utm.gif

__utm.gif

11 ms

Accessibility Review

updatecenter.norton.com accessibility score

92

Accessibility Issues

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Best Practices

updatecenter.norton.com best practices score

75

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

updatecenter.norton.com SEO score

50

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

High

robots.txt is not valid

Language and Encoding

  • Language Detected

    EN

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Updatecenter.norton.com can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Updatecenter.norton.com main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

updatecenter.norton.com

Open Graph description is not detected on the main page of Update Center Norton. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: