Developer Tools
SEO testing made easy: Disable JS, CSS, images & cookies. Simulate user-agents, mobile devices and more!
Compare extensions
Developer Tools
SEO checker: Title, meta description, language, word count, sitename, robots tag, canonical, heading, image alt, all link and more.
Audience & ratings
Store users
1K
2K
Ratings
What stands out
SEO CENTER Extension reports the larger audience. These are store counts. The rating difference is 0.47 points across 6 and 10 ratings.
Category overlap does not establish that two products serve the same workflow.
Product & publisher
Publisher
sam
seocenter.vn
Publisher portfolio
2 listings
1 listing
Listing status
Active
Active
Manifest
Version 3
Version 3
Package size
113KiB
239KiB
Permissions & access
Requested capabilities describe access, not developer intent or a safety verdict.
API permissions
5 requested
- storage
- scripting
- debugger
- declarativeNetRequest
- contentSettings
11 requested
- activeTab
- contextMenus
- storage
- downloads
- offscreen
- scripting
- webRequest
- webNavigation
- tabs
- sidePanel
- declarativeNetRequest
Website patterns
1 recorded
- <all_urls>
1 recorded
- <all_urls>
Releases
Explore the release history
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Create your free accountEvidence behind this comparison
Both listings observed 2 Oct 2026.
Store users and ratings are observations, not revenue or lifetime installs. A larger audience or a higher score does not establish product quality.
How Earlygap collects evidenceReplace an extension
Your comparison
2 of 2 selected
SEO Toggle - An SEO Testing ExtensionDeveloper Tools
SEO CENTER ExtensionDeveloper Tools