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Firefox for Web Developers engagement report

@FirefoxWebDevs - 90K followers on X

Measured over 7 original posts from a 30-day window, last computed on August 28, 2026.

Engagement

Per follower
0.097%
of 90K followers
Per impression
1.33%
6.5K views on a typical post
Reach
7.25%
of its followers see a post
Typical post
87
interactions (median)
Saved
0.168%
11 bookmarks on a typical post
Posting rate
0.47/day
active 27% of days
Peak time
13:00 UTC
Tuesday

Early reading. We have captured 7 original posts for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.

A typical post picks up 87 interactions against 90K followers, an engagement rate of 0.097%. Posts are seen about 6.5K times each, and 1.33% of those impressions turn into an interaction. That is about 7.25% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.47 posts a day over the last 30 days, though only 27% of days saw any activity at all. Most posts go out around 13:00 UTC, and Tuesday is the busiest day of the week. Of the 7 posts sampled, 43% carry an image or video, 57% are part of a thread and 57% link out. The account's strongest tracked post pulled 412 interactions, about 4.7x its own typical post. Only 7 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.

Measured over 7 original posts from a 30-day window, last computed on August 28, 2026.

Where this sits in the catalog

At 0.097%, Firefox for Web Developers sits above the 50th percentile of the 37,701 accounts in this comparison. That places it in the above the median band, which runs 0.081% to 0.439%.

p100.002%
p250.012%
p50 (median)0.081%
p750.439%
p902.10%
p99156.3%
Engagement rate as a share of followers, across the 37,701 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 104,204 times apart and a linear axis would flatten everything below the median into a single point.
Show the percentile table
Engagement rate percentiles
PercentileEngagement rate
10th percentile0.002%
25th percentile0.012%
50th percentile0.081%
75th percentile0.439%
90th percentile2.10%
99th percentile156.3%

This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built

Posting timing

This account posts most often around 13:00 UTC, and Tuesday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.

Engagement by hour posted, UTCTwenty-four bars, one per UTC hour. Each bar shows how posts published in that hour compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest hour: 13:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 6%Busiest hour: 13:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%53K
01:00 UTC-2%53K
02:00 UTC-3%52K
03:00 UTC-4%55K
04:00 UTC-6%44K
05:00 UTC-4%43K
06:00 UTC-4%50K
07:00 UTC-5%54K
08:00 UTC-4%63K
09:00 UTC-3%72K
10:00 UTC-2%75K
11:00 UTC-3%81K
12:00 UTC-2%90K
13:00 UTC-2%98K
14:00 UTC-3%101K
15:00 UTC-2%105K
16:00 UTC-4%102K
17:00 UTC-3%95K
18:00 UTC-1%88K
19:00 UTC-2%83K
20:00 UTC-1%77K
21:00 UTC-1%69K
22:00 UTC-2%60K
23:00 UTC-2%53K
Engagement by day of weekSeven bars, one per weekday, Sunday first. Each bar shows how posts published on that day compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest day: Tuesday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 5%Busiest day: Tuesday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%238K
Monday0%302K
Tuesday-3%302K
Wednesday-1%257K
Thursday-2%250K
Friday-3%259K
Saturday+3%233K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Best tweets

  • Aug 24, 20264.7x their median

    Intent to ship: JPEG XL! This will be on-by-default in Firefox 157, which should become the main release version at the end of September. This includes key JPEG XL features like progressive rendering. https://t.co/pLqTFFVVnf

    353448718K viewsView on X
  • Apr 1, 20264.0x their median

    Can you tell CSS from BS? Can you beat my score? https://t.co/du1ZwdzEYM https://t.co/lcdl1MwbAI

    315254137K viewsView on X
  • Apr 23, 20263.4x their median

    sizes="auto" landed in Firefox 150, making responsive images simpler and more reliable. Here's when you can use it, and how… https://t.co/5tSvSovsD1

    245429222K viewsView on X
  • Dec 15, 20253.2x their median

    JavaScript declarations in conditionals was discussed at TC39 recently, but consensus broke down over one key detail. How do you think it should behave? https://t.co/F5JGG0Kgmb

    2292130234K viewsView on X
  • Apr 21, 20263.2x their median

    Firefox 150 just landed & includes new web platform features like: 🎉 sizes="auto" on images 🎉 light-dark() image support 🎉 CSS revert-rule 🎉 ariaNotify() 🎉 Media pseudo-classes like :playing None of these are baseline yet, so check MDN for support https://t.co/pQ04X68nrY

    220497225K viewsView on X
  • Apr 30, 20262.7x their median

    Chrome looks set to ship an LLM Prompt API to the web platform. At Mozilla, we oppose this API. We feel it has a large interoperability risk, and Google imposing T&Cs on a web API sets a dangerous precedent. Full details: https://t.co/fAmHANzAjU

    1843610721K viewsView on X
  • Aug 24, 20262.2x their median

    JPEG XL is slated to ship in Firefox 157 next month! Here's how we're shipping it safely… https://t.co/WwOkRf5cUP

    147323612K viewsView on X
  • Apr 27, 20261.9x their median

    CSS's light-dark() now accepts images, making it simpler to define alternate values for a dark color scheme. Here's how it works: https://t.co/lGibGHAiN6

    139173320K viewsView on X
  • Jun 2, 20261.7x their median

    Ever struggled to get heading tags right in includes/components? headingoffset could be the answer… https://t.co/YeZy9Ae91V

    1132210612K viewsView on X
  • Aug 18, 20261.6x their median

    Firefox 154 landed today, and brings with it some great web platform features: 🎉 CSS text-box 🎉 CSS sibling-index() and sibling-count() 🎉 JS Iterator methods like chunks, window, includes, & join 🎉 HTTP No-Vary-Search …And more! https://t.co/4w76Li3X1B

    12219107.4K viewsView on X

Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.

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Reading these numbers

A typical post picks up 87 interactions against 90K followers, an engagement rate of 0.097%. Posts are seen about 6.5K times each, and 1.33% of those impressions turn into an interaction. That is about 7.25% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.47 posts a day over the last 30 days, though only 27% of days saw any activity at all. Most posts go out around 13:00 UTC, and Tuesday is the busiest day of the week. Of the 7 posts sampled, 43% carry an image or video, 57% are part of a thread and 57% link out. The account's strongest tracked post pulled 412 interactions, about 4.7x its own typical post. Only 7 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.

What is Firefox for Web Developers's engagement rate on X?
Firefox for Web Developers (@FirefoxWebDevs) has an engagement rate of 0.097%, based on the median interactions across 7 original posts from the last 30 days against 90,128 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.097%, Firefox for Web Developers sits above the 50th percentile of the 37,701 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
Does @FirefoxWebDevs have real engagement?
There is not yet enough sample to rank this account against others of its size.
When does @FirefoxWebDevs post?
Most posts go out around 13:00 UTC, and Tuesday is its busiest day, at roughly 0.47 posts per day across the measured window.

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