Add showInstallCountsForOfficialOnly flag to marketplace config

Only show install counts in the plugin marketplace for official
claude-plugins-official plugins (those with author.email set to
support@anthropic.com). Unofficial/external plugins will not
display install counts.

Slack thread: https://anthropic.slack.com/archives/C09UPL58BUZ/p1770933725150989

https://claude.ai/code/session_01Ba5UH1rQKgRc3WznA6RAoc

.claude-plugin/marketplace.json

@@ -6,6 +6,7 @@
     "name": "Anthropic",
     "email": "support@anthropic.com"
   },
+  "showInstallCountsForOfficialOnly": true,
   "plugins": [
     {
       "name": "typescript-lsp",
@@ -639,6 +640,16 @@
         "url": "https://github.com/sonatype/sonatype-guide-claude-plugin.git"
       },
       "homepage": "https://github.com/sonatype/sonatype-guide-claude-plugin.git"
+    },
+    {
+      "name": "firecrawl",
+      "description": "Web scraping and crawling powered by Firecrawl. Turn any website into clean, LLM-ready markdown or structured data. Scrape single pages, crawl entire sites, search the web, and extract structured information. Includes an AI agent for autonomous multi-source data gathering - just describe what you need and it finds, navigates, and extracts automatically.",
+      "category": "development",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/firecrawl/firecrawl-claude-plugin.git"
+      },
+      "homepage": "https://github.com/firecrawl/firecrawl-claude-plugin.git"
     }
   ]
 }