DEVELOPER.MOZILLA.ORG Website Review

Basic Information

Site Title:
Server:
Google Frontend

Pages Indexed

Bing:
Google:

Page Information

Title:
MDN Web Docs
Length: 12 character(s); Best length: 10 ~ 60 character(s)
Meta description:
The MDN Web Docs site provides information about Open Web technologies including HTML, CSS, and APIs for both Web sites and progressive web apps.
Length: 145 character(s); Best length: 50 ~ 160 character(s)
Meta keywords:
Length: 0 character(s); Best length: 10 ~ 255 character(s)

The length of your meta keywords seems to be outside the recommended range. Ideally, a meta keywords should be between 10 and 255 characters, including spaces.

Meta keywords are a specific type of meta tag that appear in the HTML code of a web page. They provide information to search engines about the topic of the page. Meta keywords were once used to help rank web pages in search engine results. However, due to the abuse by webmasters and marketers, Google claims to have stopped using them more than a decade ago. Despite this, there are still reasons to consider using meta keywords:

  • Uncertain Impact on Google's Algorithm: While Google devalued meta keywords, it is uncertain if they were entirely removed from its ranking algorithm. Google keeps its ranking algorithms top secret to deter people from gaming the system.
  • Other Search Engines and CMS: Other search engines like Yandex, Baidu, and Naver may still use meta keywords. Additionally, some internal CMS search systems, such as SOLR and Algolia, also utilize the meta keywords tag.

Best practices for Meta Keywords

  • Relevance is Key: It is crucial to choose keywords that accurately reflect the content of your page.
  • Keep it Limited: It is generally recommended not to exceed more than 10 meta keywords for a single page. Also, the content length should not exceed 255 characters (including spaces).
  • Consider Long-Tail Keywords: Long-tail keywords are more specific and longer phrases that target a niche audience. These keywords can be highly effective in driving targeted traffic to your website.

Remember, meta keywords are just one aspect of search engine optimization (SEO), and search engines now place less emphasis on them compared to other factors. However, by following these best practices, you can still optimize your meta keywords effectively and improve the visibility of your web pages.

H1 Tag:
Resources for Developers, by Developers
Length: 39 character(s); Best length: 10 ~ 255 character(s)

Site Technology

Server:
Google Frontend
SSL Secure:
Available
robots.txt:
Unavailable
XML Sitemap:
Unavailable
Gzip Compress:
Available
favicon.ico:
Unavailable

HTTP Header Analysis

HTTP header fields are components of the message header of requests and responses in the Hypertext Transfer Protocol (HTTP). They define the operating parameters of an HTTP transaction. The header fields are not directly displayed by normal web browsers like Internet Explorer, Google Chrome, Firefox etc. Below is the HTTP Header information of developer.mozilla.org:
HTTP/1.1 200 OK
Connection: keep-alive
Content-Length: 16104
last-modified: Sat, 28 Mar 2026 01:10:09 GMT
x-goog-stored-content-encoding: identity
etag: "90736cca4356753df584e6dbadf73ded"
server: Google Frontend
content-type: text/html
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x-goog-storage-class: STANDARD
cache-control: public, max-age=3600
x-goog-metageneration: 1
x-goog-meta-goog-reserved-file-mtime: 1774659074
x-content-type-options: nosniff
referrer-policy: strict-origin-when-cross-origin
x-goog-stored-content-length: 112772
x-cloud-trace-context: a682fe6f6008026145c0237aaf1d9b17
expires: Sat, 28 Mar 2026 02:24:17 GMT
x-guploader-uploadid: AMNfjG0tQ27a3JLrLkJZq63eyv9xZYJDX-e791eB5numxBM54pGeiCp_8i8HWSGtNN7mTjC8
x-goog-generation: 1774660209485110
strict-transport-security: max-age=63072000
x-frame-options: DENY
via: 1.1 google, 1.1 varnish, 1.1 varnish, 1.1 varnish
x-goog-hash: crc32c=zq/3fQ==, md5=kHNsykNWdT31hObbrfc97Q==
Content-Encoding: gzip
Accept-Ranges: bytes
Date: Sat, 28 Mar 2026 09:12:15 GMT
Age: 2160
X-Served-By: cache-bfi-krnt7300087-BFI, cache-bfi-krnt7300047-BFI, cache-iad-kjyo7100049-IAD
X-Cache: MISS, HIT, HIT
X-Cache-Hits: 0, 1265, 1
X-Timer: S1774689135.464780,VS0,VE1
Vary: Accept-Encoding

DNS Record Analysis

Domain Name Systes (DNS) translates easily memorized domain names to the numerical IP addresses needed for the purpose of locating computer services and devices worldwide. There are total 27 DNS record(s) of mozilla.org.
Host Type IP/Target TTL Extra Infomation
mozilla.orgA340
mozilla.orgNS3600
mozilla.orgNS3600
mozilla.orgNS3600
mozilla.orgNS3600
mozilla.orgSOA3600expire: 1209600
serial: 2024020722
mozilla.orgMX60pri: 1
mozilla.orgMX60pri: 5
mozilla.orgMX60pri: 10
mozilla.orgMX60pri: 5
mozilla.orgTXT
google-site-verification=Lo_B34AJAe70BQVNF1Fo1zGGJudPmw9bLTnP2C8lV-s
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mozilla.orgTXT
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mozilla.orgTXT
google-site-verification=mU3ta-ZJga-aCNg7IlaRaGYK9sDOMagHRNGVW1FSJGE
58
mozilla.orgTXT
yandex-verification
58
mozilla.orgTXT
MS=ms14343235
58
mozilla.orgTXT
google-site-verification=E1vBHtOW-D9IlAj-pbRM-8PrOSiPDT48lrwRlW82ysw
58
mozilla.orgTXT
google-site-verification=Brpe3hQpo9FlGIHMtK4ViKL60L0G8VM16nXopwVDoEU
58
mozilla.orgTXT
google-site-verification=z68pON7CWSaZu_sBqDQofmDL19OVp3krGEjaDl7cSaU
58
mozilla.orgTXT
google-site-verification=S3M17z96OKfZJ2dq7mYqQDfRWsEVjy3hdxaSyB72YPc
58
mozilla.orgTXT
v=spf1 include:%{i}._ip.%{h}._ehlo.%{d}._spf.vali.email include:_spf.mozilla.com include:_spf.google.com include:spf.fundraiseup.com ~all
58
mozilla.orgTXT
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58
mozilla.orgTXT
anthropic-domain-verification-w5rph5=bZ2V4N0ps4oFSU6yrv4DfD6nA
58
mozilla.orgTXT
ZOOM_verify_lGxIzL49Id7PipUgDgTd9K
58
mozilla.orgTXT
openai-domain-verification=dv-J6NgbJamHFrHSyNqlhElIX5K
58
mozilla.orgTXT
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58
mozilla.orgTXT
google-site-verification=Ep3NdzNxaf8Vl48dniNneaqm7JcWUiy3GjKS0wx5zQw
58
mozilla.orgAAAA
2600:1901::c197:0:0:0:0
2271