Simeon.__proto__
@dotproto.com
Lover of the open web, keyboards, browser extensions, ceramics, and video games.
Currently: Add-ons DevRel at Mozilla, co-chair of the W3C WebExtensions Community Group
Previously: Chrome, video game industry
Currently: Add-ons DevRel at Mozilla, co-chair of the W3C WebExtensions Community Group
Previously: Chrome, video game industry
My time at Mozilla has officially ended
For the past two years I've been contracting with Mozilla as a Sr. DevRel Engineer. While I've enjoyed and appreciate my time with the team, it's time for me to move on to the next challenge
But first, a long overdue break 🏝️🧘♂️😌
For the past two years I've been contracting with Mozilla as a Sr. DevRel Engineer. While I've enjoyed and appreciate my time with the team, it's time for me to move on to the next challenge
But first, a long overdue break 🏝️🧘♂️😌
December 27, 2025 at 12:32 AM
My time at Mozilla has officially ended
For the past two years I've been contracting with Mozilla as a Sr. DevRel Engineer. While I've enjoyed and appreciate my time with the team, it's time for me to move on to the next challenge
But first, a long overdue break 🏝️🧘♂️😌
For the past two years I've been contracting with Mozilla as a Sr. DevRel Engineer. While I've enjoyed and appreciate my time with the team, it's time for me to move on to the next challenge
But first, a long overdue break 🏝️🧘♂️😌
Reposted by Simeon.__proto__
This year's GitHub Octoverse annual survey did a good job of correctly representing TypeScript & JavaScript as a single ecosystem.
When this combined data is omitted, it results in misleading takes.
When this combined data is omitted, it results in misleading takes.
December 26, 2025 at 4:09 AM
This year's GitHub Octoverse annual survey did a good job of correctly representing TypeScript & JavaScript as a single ecosystem.
When this combined data is omitted, it results in misleading takes.
When this combined data is omitted, it results in misleading takes.
I'm about ~10 hours into Arc Raiders
Good
- Solid "pick up everything you see" sim
- stumbling into another player and trading a toaster for a handful of berries
- Arc = robot spiders?
Bad
- pvp is 😮💨
- the big jumpy spiders are mean
- getting sniped just as you're about to leave a level
Good
- Solid "pick up everything you see" sim
- stumbling into another player and trading a toaster for a handful of berries
- Arc = robot spiders?
Bad
- pvp is 😮💨
- the big jumpy spiders are mean
- getting sniped just as you're about to leave a level
December 25, 2025 at 7:12 PM
I'm about ~10 hours into Arc Raiders
Good
- Solid "pick up everything you see" sim
- stumbling into another player and trading a toaster for a handful of berries
- Arc = robot spiders?
Bad
- pvp is 😮💨
- the big jumpy spiders are mean
- getting sniped just as you're about to leave a level
Good
- Solid "pick up everything you see" sim
- stumbling into another player and trading a toaster for a handful of berries
- Arc = robot spiders?
Bad
- pvp is 😮💨
- the big jumpy spiders are mean
- getting sniped just as you're about to leave a level
I accidentally pushed my laptop off the far end of my desk and now the backlight is doing this
December 25, 2025 at 3:41 AM
I accidentally pushed my laptop off the far end of my desk and now the backlight is doing this
1 (single monitor desktop) and 9 (laptop) are most of my life. I've found that having more screens is more distracting than helpful, but I've got the ADHDees so…
December 19, 2025 at 4:37 PM
1 (single monitor desktop) and 9 (laptop) are most of my life. I've found that having more screens is more distracting than helpful, but I've got the ADHDees so…
Just put together a demo of styling elements based on relative values (X >= Y)
codepen.io/dotproto/pen...
codepen.io/dotproto/pen...
Conditional styling by relative numeric values (greater than/less than)
...
codepen.io
December 17, 2025 at 10:41 PM
Just put together a demo of styling elements based on relative values (X >= Y)
codepen.io/dotproto/pen...
codepen.io/dotproto/pen...
Reposted by Simeon.__proto__
The css-values-5 spec builds on top of css-values-4 – a so-called diff spec. This is mentioned in the intro:
> This is a diff spec against CSS Values and Units Level 4.
> This is a diff spec against CSS Values and Units Level 4.
December 17, 2025 at 10:15 PM
The css-values-5 spec builds on top of css-values-4 – a so-called diff spec. This is mentioned in the intro:
> This is a diff spec against CSS Values and Units Level 4.
> This is a diff spec against CSS Values and Units Level 4.
CSS spec folks, why doesn't drafts.csswg.org/css-values-5/ include the math functions from level 4?
CSS Values and Units Module Level 5
drafts.csswg.org
December 17, 2025 at 9:01 PM
CSS spec folks, why doesn't drafts.csswg.org/css-values-5/ include the math functions from level 4?
Reposted by Simeon.__proto__
I'm looking for some feedback on a Chrome Extension that I made.
I wanted to explore the user trails concept from the Memex.
Trails - chromewebstore.google.com/detail/trail... - allows you to create your own links between pages entirely locally and have them maintained across navigations.
I wanted to explore the user trails concept from the Memex.
Trails - chromewebstore.google.com/detail/trail... - allows you to create your own links between pages entirely locally and have them maintained across navigations.
Trails - Chrome Web Store
Create links between content on any web page and any other and have them persist.
chromewebstore.google.com
December 15, 2025 at 10:19 PM
I'm looking for some feedback on a Chrome Extension that I made.
I wanted to explore the user trails concept from the Memex.
Trails - chromewebstore.google.com/detail/trail... - allows you to create your own links between pages entirely locally and have them maintained across navigations.
I wanted to explore the user trails concept from the Memex.
Trails - chromewebstore.google.com/detail/trail... - allows you to create your own links between pages entirely locally and have them maintained across navigations.
@bram.us looks like chrome.dev is borked
December 15, 2025 at 9:45 PM
@bram.us looks like chrome.dev is borked
@rachelandrew.bsky.social does web.dev or chrome.dev have a guest writing program similar to CSS Tricks? css-tricks.com/guest-writing/
December 15, 2025 at 9:30 PM
@rachelandrew.bsky.social does web.dev or chrome.dev have a guest writing program similar to CSS Tricks? css-tricks.com/guest-writing/
Reposted by Simeon.__proto__
If you’re using server-side AI models, you usually need an API key to call them. A couple of weeks back I made a video looking at how to handle that in a Chrome extension: youtu.be/pl4pz4nWa3w
How can you keep API keys safe in a Chrome Extension?
YouTube video by Chrome for Developers
youtu.be
December 15, 2025 at 5:40 PM
If you’re using server-side AI models, you usually need an API key to call them. A couple of weeks back I made a video looking at how to handle that in a Chrome extension: youtu.be/pl4pz4nWa3w
Traveling for work has made me realize that I really like scrambled eggs, actually
December 15, 2025 at 6:40 PM
Traveling for work has made me realize that I really like scrambled eggs, actually
I forgot how much Opus Number 1 slaps www.youtube.com/watch?v=N7xn...
Opus No. 1
YouTube video by Tim Carleton - Topic
www.youtube.com
December 15, 2025 at 2:47 AM
I forgot how much Opus Number 1 slaps www.youtube.com/watch?v=N7xn...
I think I'm bailing on Clair Obscur: Expedition 33. It's clearly a great game and I'm enjoying the story enough that I'm going to hunt down a cinematic compilation, but I've never been into JRPGs gameplay and I'm still chafing against it
December 13, 2025 at 7:39 PM
I think I'm bailing on Clair Obscur: Expedition 33. It's clearly a great game and I'm enjoying the story enough that I'm going to hunt down a cinematic compilation, but I've never been into JRPGs gameplay and I'm still chafing against it
So ... how does one recover from burnout? The big kind, not the small kind. Asking for a frenemy who is me
December 13, 2025 at 1:14 AM
So ... how does one recover from burnout? The big kind, not the small kind. Asking for a frenemy who is me
Reposted by Simeon.__proto__
New blog post: Why the Sanitizer API is just `setHTML()` - https://frederikbraun.de/why-sethtml.html
December 7, 2025 at 9:14 PM
New blog post: Why the Sanitizer API is just `setHTML()` - https://frederikbraun.de/why-sethtml.html
I'm a bit late to this, but I've been surprised by reactions to Bun's acquisition because it seems relatively obvious to me; Anthropic needs a sandbox where their AI/agents can run untrusted code and Bun is a small, dedicated team focused on a bundled runtime for the world's most widely deployed JIT
December 6, 2025 at 11:12 AM
I'm a bit late to this, but I've been surprised by reactions to Bun's acquisition because it seems relatively obvious to me; Anthropic needs a sandbox where their AI/agents can run untrusted code and Bun is a small, dedicated team focused on a bundled runtime for the world's most widely deployed JIT
I hope CloudFlare enjoys it's nap
December 5, 2025 at 9:08 AM
I hope CloudFlare enjoys it's nap
Reposted by Simeon.__proto__
Fit width text in 1 line of CSS
`text-grow: per-line scale;`
nerdy.dev/css-text-grow
(prototype in Canary 165+)
`text-grow: per-line scale;`
nerdy.dev/css-text-grow
(prototype in Canary 165+)
December 5, 2025 at 6:48 AM
Fit width text in 1 line of CSS
`text-grow: per-line scale;`
nerdy.dev/css-text-grow
(prototype in Canary 165+)
`text-grow: per-line scale;`
nerdy.dev/css-text-grow
(prototype in Canary 165+)
It bothers me when online pundits praise Zen browser and say nothing of Arc
December 4, 2025 at 9:56 PM
It bothers me when online pundits praise Zen browser and say nothing of Arc
Reposted by Simeon.__proto__
🎙️ The CSS Podcast is back with a new episode on anchor positioning → goo.gle/3XwW4dk
@una.im and @bram.us discuss how this powerful new API revolutionizes placing UI elements like tooltips and popovers, all without complex JavaScript.
@una.im and @bram.us discuss how this powerful new API revolutionizes placing UI elements like tooltips and popovers, all without complex JavaScript.
December 2, 2025 at 5:00 PM
🎙️ The CSS Podcast is back with a new episode on anchor positioning → goo.gle/3XwW4dk
@una.im and @bram.us discuss how this powerful new API revolutionizes placing UI elements like tooltips and popovers, all without complex JavaScript.
@una.im and @bram.us discuss how this powerful new API revolutionizes placing UI elements like tooltips and popovers, all without complex JavaScript.
Reposted by Simeon.__proto__
Gecko: Intent to ship: CSS Anchor Positioning
Gecko: Intent to ship: CSS Anchor Positioning
Gecko: Intent to ship: CSS Anchor Positioning
groups.google.com
December 2, 2025 at 9:46 PM
Gecko: Intent to ship: CSS Anchor Positioning
Reposted by Simeon.__proto__
For the first time, the Web Extensions specification is linked on MDN! As we start building it out, I’m excited to see this more 🙂
developer.mozilla.org/en-US/docs/M...
developer.mozilla.org/en-US/docs/M...
November 27, 2025 at 9:25 AM
For the first time, the Web Extensions specification is linked on MDN! As we start building it out, I’m excited to see this more 🙂
developer.mozilla.org/en-US/docs/M...
developer.mozilla.org/en-US/docs/M...
I'm continually frustrated by the narrowness of digital systems
The example I think about most often is paper. Word processors are great, but you now what else is great? Putting your fingers between pages and flicking back and forth between them, writing reminders in the margins, 1/9
The example I think about most often is paper. Word processors are great, but you now what else is great? Putting your fingers between pages and flicking back and forth between them, writing reminders in the margins, 1/9
November 27, 2025 at 12:01 AM
I'm continually frustrated by the narrowness of digital systems
The example I think about most often is paper. Word processors are great, but you now what else is great? Putting your fingers between pages and flicking back and forth between them, writing reminders in the margins, 1/9
The example I think about most often is paper. Word processors are great, but you now what else is great? Putting your fingers between pages and flicking back and forth between them, writing reminders in the margins, 1/9