#extension

Live, measured metrics for the hashtag #extension from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.

hashtag.org network · sponsored

Own #extension

This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.

$51.02/ year · 9-character #name
Claim #extension — $51.02/yr→Buy on hashtag.space (web3)
card via hashtag.org · tokens via hashtag.space
6
Uses / 7 days
Mastodon
6
Accounts / 7 days
Mastodon
40
Recent posts
Mastodon
~0/hr
Recent pace
Mastodon · last 40
0.3
Avg reactions / post
Mastodon · last 40
—
Reddit posts / month
Reddit search
—
Open-web mentions
hashtag.org Firehose

Day-by-day usage

measured · fosstodon.org (Mastodon public tags API) · fetched 2026-09-12 07:04 UTC
1
09-06
0
09-07
1
09-08
1
09-09
0
09-10
2
09-11
1
09-12

6 uses by 6 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.

Related hashtags

measured · fosstodon.org (Mastodon public search API) · fetched 2026-09-12 07:04 UTC
#extensions
2 uses · 2 accounts / 7d
#extensionfr
0 uses · 0 accounts / 7d
#extensionmagazine
1 uses · 1 accounts / 7d
#length_extension
0 uses · 0 accounts / 7d
#shell_extension
0 uses · 0 accounts / 7d
#chrome_extension
0 uses · 0 accounts / 7d
#cooperativeExtension
2 uses · 2 accounts / 7d
#BatterseaExtension
0 uses · 0 accounts / 7d
#extensionindexers
0 uses · 0 accounts / 7d
#extensionofterm
0 uses · 0 accounts / 7d
#extensionprogram
0 uses · 0 accounts / 7d
#extensioncord
0 uses · 0 accounts / 7d

Live pulse

measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-09-12 07:04 UTC

Everything below is measured over the latest 40 public posts (spanning ~1424 hours).

Posting hours (UTC) — busiest: 11:00

00:0012:0023:00

Languages: English (28) · German (3) · Japanese (2) · Chinese (2) · French (2) · Spanish (1)

Avg boosts / post: 0.9

Top of the latest posts

  • @nixCraft @Ollivdb We have one multitool in this situation. LocalCDN. LocalCDN is a web browser extension that emulates Content Delivery Networks to improve your online privacy. It intercepts traffic, finds supported resources locally, and

    Who Let The Dogs Out 🐾@[email protected]♥ 6↻ 32026-07-18 11:37 UTCView post →

  • Chrome ModHeader Extension Pulled Over Hidden Tracker 🔗 https://cybersecurefox.com/en/modheader-chrome-extension-hidden-tracking #modheader #chrome #extension #edge #extension #data #exfiltration #browser #history #tracking

    CyberSecureFox :loading:@[email protected]♥ 2↻ 32026-07-15 10:05 UTCView post →

  • RE: https://mastodon.social/@itsfoss/117252812021536321 #DarkReader #Firefox #Chrome #Extension #DarkMode

    Wilfredo 💬@wilfredo♥ 1↻ 02026-09-11 22:16 UTCView post →

What “extension” means

Wiktionary

extension/ɪkˈstɛnʃən/

  • nounThe act of extending; a stretching out; enlargement in length or breadth; an increase
Full entry on Wiktionary →

#extension across platforms

every network with a public tag surface

Follow #extension straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.

X (Twitter) ↗Instagram ↗TikTok ↗Facebook ↗LinkedIn ↗YouTube ↗Threads ↗Bluesky ↗Mastodon ↗Reddit ↗Pinterest ↗Tumblr ↗

Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/extension