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Top Technologies

Google Font API
Font Scripts
Nginx
Web Servers
CloudFlare
CDN
Varnish
Cache Tools
Google Tag Manager
Tag Managers
Font Awesome
Font Scripts
Twitter Bootstrap
Web Frameworks
WordPress
CMS

24 mozilla.com Last Updated: 9 hours

Success 62% of passed verification steps
Warning 23% of total warning
Errors 15% of total errors, require fast action

Desktop

Mobile

Performance Desktop Score 100%
Best Practices Desktop Score 96%
SEO Desktop Score 100%
Page Authority Authority 0%
Domain Authority Domain Authority 0%
Moz Rank 0.0/10
Bounce Rate Rate 0%
charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 38 Characters
GET FIREFOX FOR DESKTOP — FIREFOX (US)
Meta Description 142 Characters
Get Firefox for Windows, Mac or Linux. Firefox is a free web browser backed by Mozilla, a non-profit dedicated to internet health and privacy.
Effective URL 23 Characters
https://www.firefox.com
Excerpt Page content
Get Firefox for desktop — Firefox (US) ...
Keywords Cloud Density
firefox39 download19 browser10 support8 release7 privacy6 tabs6 below5 español4 internet4
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
firefox 39
download 19
browser 10
support 8
release 7
privacy 6
tabs 6
below 5
español 4
internet 4
Google Preview Your look like this in google search result
GET FIREFOX FOR DESKTOP — FIREFOX (US)
https://www.firefox.com
Get Firefox for Windows, Mac or Linux. Firefox is a free web browser backed by Mozilla, a non-profit dedicated to internet health and privacy.
Robots.txt File Detected
Sitemap.xml File Detected
Page Size Code & Text Ratio
Document Size: ~48.63 KB
Code Size: ~37.39 KB
Text Size: ~11.24 KB Ratio: 23.12%

Social Data

Estimation Traffic and Earnings

8
Unique Visits
Daily
14
Pages Views
Daily
$0
Income
Daily
224
Unique Visits
Monthly
399
Pages Views
Monthly
$0
Income
Monthly
2,592
Unique Visits
Yearly
4,704
Pages Views
Yearly
$0
Income
Yearly

Desktop

Desktop Screenshot
Minimizes main-thread work 0.4 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Server Backend Latencies 20 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Avoid serving legacy JavaScript to modern browsers Est savings of 10 KiB
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile [Baseline](https://web.dev/baseline) features, unless you know you must support legacy browsers
Max Potential First Input Delay 80 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
First Contentful Paint 0.4 s
First Contentful Paint marks the time at which the first text or image is painted
Avoid long main-thread tasks 2 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Reduce unused JavaScript Est savings of 98 KiB
Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity
Total Blocking Time 10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Avoid chaining critical requests 14 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Time to Interactive 1.0 s
Time to Interactive is the amount of time it takes for the page to become fully interactive
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Minimize third-party usage Third-party code blocked the main thread for 30 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Avoids enormous network payloads Total size was 426 KiB
Large network payloads cost users real money and are highly correlated with long load times
JavaScript execution time 0.1 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Render blocking requests Est savings of 210 ms
Requests are blocking the page's initial render, which may delay LCP
Legacy JavaScript Est savings of 13 KiB
Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile [Baseline](https://web.dev/articles/baseline-and-polyfills) features, unless you know you must support older browsers
Avoids an excessive DOM size 372 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Cumulative Layout Shift 0.004
Cumulative Layout Shift measures the movement of visible elements within the viewport
Avoid large layout shifts 1 layout shift found
These are the largest layout shifts observed on the page. Each table item represents a single layout shift, and shows the element that shifted the most. Below each item are possible root causes that led to the layout shift. Some of these layout shifts may not be included in the CLS metric value due to [windowing](https://web.dev/articles/cls#what_is_cls)
Largest Contentful Paint 0.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Uses efficient cache policy on static assets 0 resources found
A long cache lifetime can speed up repeat visits to your page
Initial server response time was short Root document took 180 ms
Keep the server response time for the main document short because all other requests depend on it
Speed Index 0.5 s
Speed Index shows how quickly the contents of a page are visibly populated
Largest Contentful Paint element 430 ms
This is the largest contentful element painted within the viewport

Mobile

Mobile Screenshot

Speed And Optimization Tips

Website speed has a huge impact on performance, affecting user experience, conversion rates and even rankings. ‪‬‬By reducing page load-times, users are less likely to get distracted and the search engines are more likely to reward you by ranking you
Title Website
Congratulations! Your title is optimized
Description Website
Congratulations! Your description is optimized
Robots.txt
Congratulations! Your site have a robots.txt file
Sitemap.xml
Congratulations! We've found a sitemap file for your website
SSL Secure
Warning! Your website is not SSL secured (HTTPS).
Headings
Congratulations! You are using your H1 and H2 tags in your site
Blacklist
Congratulations! Your site is not listed in a blacklist
W3C Validator
Warning! Your site have errors W3C
Accelerated Mobile Pages (AMP)
Warning! Your site not have AMP Version
Domain Authority
Warning! Domain Authority of your website is slow. It is good to have domain authority more than 25.
GZIP Compress
Warning! Your site not is compressed, this can make slower response for the visitors
Favicon
Congratulations! Your website appears to have a favicon.
Broken Links
Congratulations! You not have broken links View links

Alexa Rank

99,999,999

Global Rank

99,999,999

-
Traffic
Search

Domain Available

Domain (TDL) and Typo Status
mozilla.co Available
mozilla.us Already Registered
mozilla.com Already Registered
mozilla.org Already Registered
mozilla.net Already Registered
mzilla.com Available
jozilla.com Available
iozilla.com Already Registered

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server
HTTP/1.1 200 OK
Connection: keep-alive
Content-Length: 8450
cache-control: max-age=600
server: granian
x-frame-options: DENY
x-backend-server: springfield-55b5d5c988-plc54.gcp-us-west1
content-security-policy-report-only: img-src 'self' data: www.firefox.com www.google-analytics.com www.googletagmanager.com www.mozilla.org; frame-src 'self' accounts.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube.com; form-action 'self' https://accounts.firefox.com/ https://basket.mozilla.org; frame-ancestors 'none'; style-src 'self' www.firefox.com; connect-src 'self' basket.mozilla.org https://accounts.firefox.com/ https://basket.mozilla.org o1069899.ingest.sentry.io o1069899.ingest.us.sentry.io o1069899.sentry.io region1.google-analytics.com www.firefox.com www.google-analytics.com www.googletagmanager.com; script-src 'self' 'unsafe-eval' 'unsafe-inline' s.ytimg.com tagmanager.google.com www.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube.com; upgrade-insecure-requests; default-src 'self' www.firefox.com; object-src 'none'; font-src 'self' www.firefox.com; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.firefox.com; base-uri 'none'
expires: Sat, 02 Aug 2025 03:23:59 GMT
content-security-policy: img-src 'self' data: www.firefox.com www.google-analytics.com www.googletagmanager.com www.mozilla.org; frame-src 'self' accounts.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube.com; form-action 'self' https://accounts.firefox.com/ https://basket.mozilla.org; frame-ancestors 'none'; style-src 'self' www.firefox.com; connect-src 'self' basket.mozilla.org https://accounts.firefox.com/ https://basket.mozilla.org o1069899.ingest.sentry.io o1069899.ingest.us.sentry.io o1069899.sentry.io region1.google-analytics.com www.firefox.com www.google-analytics.com www.googletagmanager.com; script-src 'self' 'unsafe-eval' 'unsafe-inline' s.ytimg.com tagmanager.google.com www.firefox.com www.google-analytics.com www.googletagmanager.com www.youtube.com; upgrade-insecure-requests; default-src 'self' www.firefox.com; object-src 'none'; font-src 'self' www.firefox.com; media-src 'self' assets.mozilla.net videos.cdn.mozilla.net www.firefox.com; base-uri 'none'
cross-origin-opener-policy: same-origin
x-clacks-overhead: GNU Terry Pratchett
via: 1.1 google, 1.1 varnish, 1.1 varnish
x-content-type-options: nosniff
content-type: text/html; charset=utf-8
referrer-policy: strict-origin-when-cross-origin
etag: "e025e291f5af433cfbf84b1b1adcfb79"
strict-transport-security: max-age=31536000
Content-Encoding: gzip
Accept-Ranges: bytes
Age: 0
Date: Sat, 02 Aug 2025 03:13:59 GMT
X-Served-By: cache-yul1970075-YUL, cache-yul1970047-YUL
X-Cache: MISS, MISS
X-Cache-Hits: 0, 0
X-Timer: S1754104440.665534,VS0,VE174
Vary: Accept-Language, origin, Accept-Encoding
DNS Records DNS Resource Records associated with a hostname
View DNS Records