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
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%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.002% |
| 25th percentile | 0.012% |
| 50th percentile | 0.081% |
| 75th percentile | 0.439% |
| 90th percentile | 2.10% |
| 99th percentile | 156.3% |
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.
Show engagement by hour posted, utc as a table
| Hour (UTC) | Vs author median | Posts |
|---|---|---|
| 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 |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +5% | 238K |
| Monday | 0% | 302K |
| Tuesday | -3% | 302K |
| Wednesday | -1% | 257K |
| Thursday | -2% | 250K |
| Friday | -3% | 259K |
| Saturday | +3% | 233K |
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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
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.