[Feature Request] - Privacy - allow fully self-hosted usage and/or privacy preserving search

[mratsim]

Please confirm that you've done the steps above:

• Yes, I've read the README, searched existing issues, consulted an LLM, and thought it through.

Describe the issue

Hi,

The tool looks quite awesome and replicate much more naturally the way organic search is done.

For privacy reasons, it would be even better if it could be used completely self-hosted or with providers with a strong privacy policy.

This requires that:

1. Jina is not mandatory anymore
   

   open-deep-research/app/api/fetch-content/route.ts

   Lines 28 to 30 in de33da2

   	const response = await fetch(
   	`https://r.jina.ai/${encodeURIComponent(url)}`
   	)

2. The search engine can be swapped with a privacy-preserving one.

Example solutions:

1. The leading opensource alternatives to Jina seem to be
   • Crawl4AI: https://github.com/unclecode/crawl4ai
   • Firecrawl: https://github.com/mendableai/firecrawl
   and there are plenty of others (Typescript focus)

   
   - https://github.com/supermemoryai/markdowner
   - https://github.com/JimLiu/gpt-api
   - https://github.com/asadm/markdowndown
   - (go): https://github.com/zzzgydi/webscraper
2. Duckduckgo ([Feature Request] Add DuckDuckGo search (Free Option) #24) and Searxng (add SearXNG #29) are the leading privacy-focused or self-hosted search solution used in alternatives today. This additionally has the ergonomic benefit of API_TOKEN-free usage.