Analyze Download Firefox — Free Web Browser — Mozilla

Download Mozilla Firefox, a free Web browser. Firefox is created by a global non-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today...

Page load speed analysis

  • 54/100

    Normal result
  • 7

    Successful tests
  • 1

    Failed test
  • First response

    269 ms

  • Resources loaded

    5.8 sec

  • Page rendered

    5.9 sec

  • Total page load time

    12 sec

Click here to check amazing Get Firefox content for United States. Otherwise, check out these important facts you probably never knew about

We analyzed page load time and found that the first response time was 269 ms and then it took 11.7 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Page optimization

  • HTML 72.3 kB
    Images 55.2 kB
    Javascripts 198.5 kB
    CSS 0 B

    In fact, the total size of main page is 326.0 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. 50% of websites need less resources to load. Javascripts take 198.5 kB which makes up the majority of the site volume.

    • Original 72.3 kB
    • After minification 63.0 kB
    • After compression 10.9 kB

    HTML optimization

    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 9.4 kB, which is 13% 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 61.4 kB or 85% of the original size.

    • Original 55.2 kB
    • After optimization 54.3 kB

    Image optimization

    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. Get Firefox images are well optimized though.

    • Original 198.5 kB
    • After minification 198.5 kB
    • After compression 67.9 kB

    JavaScript optimization

    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 130.6 kB or 66% of the original size.

Network requests diagram

  • site-bundle.5f2462a3ca26.js
  • firefox_new_onboarding_common-bundle.136a56bfe2b9.css
  • firefox_new_onboarding_scene1-bundle.9965c4083e9a.css
  • optimizely-snippet-bundle.7119ca69b1d6.js
  • gtm-snippet-bundle.e956015fe7f3.js
  • common-bundle.bc3cd58a7ff2.js
  • stub-attribution-bundle.6f2d0cdf7104.js
  • firefox_new_scene1-bundle.6d2d044c9823.js
  • 246059135.js
  • gtm.js
  • horizon-night.53e7d3475fd0.svg
  • stars.8398dac91f60.svg
  • tabzilla-static.953a65a1f4a4.png
  • header-logo-inverse.510f97e92635.png
  • icon-sprite.6e9f0f71a7fe.svg
  • btn-google-play.77bdbc935c58.png
  • btn-app-store.1cfd5dba4a92.svg
  • moz-wordmark-light-reverse.cb1bdf6d1de6.svg
  • social-icon-sprite.bf2ae0cd0f01.svg
  • opensans-bold.2abfa530b0d8.woff
  • opensans-regular.fe6f746bb376.woff
  • opensans-light.c709d7bf4556.woff
  • opensans-semibold.3a18a24d16cb.woff

Our browser made a total of 25 requests to load all elements on the main page. We found that 4% of them (1 request) were addressed to the original, 88% (22 requests) were made to and 4% (1 request) were made to The less responsive or slowest element that took the longest time to load (3.7 sec) relates to the external source

Additional info on


The browser has sent 19 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Get Firefox. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 8 to 1 for JavaScripts and as a result speed up the page load time.









Possible request optimization











Good result


As for redirects, our browser was forwarded to before it reached this domain.

IP address uses IP addresses which are currently shared with 4 other domains. The more sites share the same stack of IP addresses, the higher the host server’s workload is. It is strongly recommended that the host server should be changed or the hosting provider should be requested to give a different (separate) IP address for this domain.

Normal result

IP Trace

DNS records

Type Host Target/ip TTL Other
A 43
A 43
NS 3583
NS 3583
NS 3583

Language and encoding

Good result


EN en language flag


EN en language flag





Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise can be misinterpreted by Google and other search engines. Our service has detected that English is used on the page, and it matches the claimed language. Our system also found out that 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.

HTTPS certificate

SSL Certificate has no SSL certificate. Web browsing can be safer with HTTPS connection, so we suggest that it should be obtained for this site.

Normal result

Visitor World Map

Country of origin for 31.2% of all visits is United States. It’s good for that their server is also located in United States, as that enables the majority of their visitors to benefit from a much faster page load time.

Good result

Good result

Social Sharing Optimization

Open Graph data is detected on the main page of Get Firefox. This is the best way to make the web page social media friendly. Here is how it looks like on Facebook:

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