browser

browser is a command for Claude Code from callmejustdodo/popcorn. It costs 19 tokens per session (310 once invoked), scanned B, original, MIT.

A command for choosing or checking which web browser the Popcorn tool controls, including Chrome, Arc, Safari, Brave, and Edge.

In plain words
What is it for?
Use it to set the controlled browser or display the current setting.
Why use it?
It prevents browser-control commands from targeting the wrong browser and stores the selected choice for later use.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths.

Part of the popcorn plugin — 3 commands, 3 hooks shipped together

Good fit Use it to set the controlled browser or display the current setting.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/callmejustdodo/popcorn/browser
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/callmejustdodo/popcorn

Made for: Claude Code.

Or install popcorn, the plugin that ships this one along with the rest of its 3 commands, 3 hooks.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for browser

README.md
[![agentmods](https://agentmods.dev/badge/commands/callmejustdodo/popcorn/browser/github.svg)](https://agentmods.dev/commands/callmejustdodo/popcorn/browser)
Your own site
<a href="https://agentmods.dev/commands/callmejustdodo/popcorn/browser"><img src="https://agentmods.dev/badge/commands/callmejustdodo/popcorn/browser/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for browser

Your own site · 80×15
<a href="https://agentmods.dev/commands/callmejustdodo/popcorn/browser"><img src="https://agentmods.dev/badge/commands/callmejustdodo/popcorn/browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 310 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00019 $0.00310
Opus 5.5 $0.00008 $0.00124
Sonnet 5.5 $0.00004 $0.00062
Haiku 4.5 $0.00002 $0.00031

Measured 1mo ago against content hash d109a491d6a5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

browser scanned grade B with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

echo "current: $(cat "$HOME/.claude/.popcorn-browser")"
commands/browser.md · 34 lines

What it actually says

Set the browser popcorn controls. Argument: $ARGUMENTS

Run this bash command to update (or show) the config, then report the result in one short sentence:

case "$ARGUMENTS" in
  chrome|Chrome|"Google Chrome")  BROWSER="Google Chrome" ;;
  arc|Arc)                        BROWSER="Arc" ;;
  safari|Safari)                  BROWSER="Safari" ;;
  brave|Brave|"Brave Browser")    BROWSER="Brave Browser" ;;
  edge|Edge|"Microsoft Edge")     BROWSER="Microsoft Edge" ;;
  "")
    if [ -f "$HOME/.claude/.popcorn-browser" ]; then
      echo "current: $(cat "$HOME/.claude/.popcorn-browser")"
    else
      echo "current: Google Chrome (default — no config set)"
    fi
    exit 0
    ;;
  *) BROWSER="$ARGUMENTS" ;;
esac
mkdir -p "$HOME/.claude"
echo "$BROWSER" > "$HOME/.claude/.popcorn-browser"
echo "popcorn browser set to: $BROWSER"

The config file lives at ~/.claude/.popcorn-browser. The hooks read it on every prompt; no restart needed.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 34 lines · 19 tokens per session scan B d109a491d6a5

Subscribe to this mod's changes

browser is a command published in the GitHub repository callmejustdodo/popcorn (9 stars, last pushed 5mo ago), licensed MIT. It adds 19 tokens to every session and 310 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.