mozilla.org Internet for people, not profit — Mozilla

Mobile Usability

95/100

Good

Mobile Speed

65/100

Medium

Download optimized image, JavaScript, and CSS resources for mozilla.org page.

Last tested: 2017-08-27

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mozilla.org Mobile Usability: 95/100
mozilla.org Mobile Usability Test Quick Overview

Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <a href="/en-US/about/">About</a> and 11 others are close to other tap targets.
The tap target <a href="https://twitter.com/mozilla">Twitter (@mozilla)</a> and 3 others are close to other tap targets.
mozilla.org Mobile Speed: 65/100
mozilla.org Mobile Speed Test Quick Overview

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 2 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
https://www.mozilla.org/media/js/site-bundle.2c4b75b020af.js
https://www.mozilla.org/media/js/gtm-snippet-bundle.245df2c8b9a5.js
Optimize CSS Delivery of the following:
https://www.mozilla.org/media/css/pebbles-bundle.fc131c16c1d8.css
https://www.mozilla.org/media/css/home-bundle.05b7388d8819.css
Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://mozilla.org/
https://www.mozilla.org/
https://www.mozilla.org/en-US/
Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 86.4KiB (72% reduction).
Compressing https://www.mozilla.org/en-US/ could save 86.4KiB (72% reduction).
Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
99.8KiB of the HTML response was required to render the above-the-fold content. This requires 3 network round-trips. However, if the HTML response were compressed, then the HTML required to render the above-the-fold content could be delivered in just 2 network round-trips. Enable compression for the HTML response in order to prioritize the visible content for this page.
Only about 2% of the final above-the-fold content could be rendered with the HTML delivered within 2 round-trips.
Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.googletagmanager.com/gtm.js?id=GTM-MW3R8V&l=dataLayer (15 minutes)
https://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 15.3KiB (13% reduction).
Minifying https://www.mozilla.org/en-US/ could save 15.3KiB (13% reduction).
Optimize images

Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 12.4KiB (17% reduction).
Compressing https://www.mozilla.org/media/img/home/2016/intro/…g-600.1ad8b9287179.jpg could save 12.4KiB (17% reduction).

mozilla.org Mobile Resources


Total Resources39
Number of Hosts4
Static Resources31
JavaScript Resources8
CSS Resources2

mozilla.org Mobile Resource Breakdown