> ## Content Index > Fetch the complete content index at: https://roundproxies.com/blog/llms.txt > Use this file to discover other available public pages before exploring further. # How to Solve Common Issues & Errors for FlareSolverr - URL: https://roundproxies.com/blog/flaresolverr-error/ - Published: 2025-05-31T15:37:20.000Z - Updated: 2026-09-23T13:04:34.000Z - Description: Fix common FlareSolverr errors like timeouts, challenge loops, and Chrome connection issues with step-by-step troubleshooting for Docker and dependencies. - Author: Marius Bernard - Tags: #dated-6839c2974fa498a2c6ee05ab FlareSolverr users are running into more timeouts, browser launch failures, and Chrome connection errors than ever. Since the team announced on GitHub that the project is deprecated, more users are hitting roadblocks, especially as Cloudflare keeps tightening its defenses. Here’s the good news: even though support has ended, FlareSolverr can still work well in many cases when it’s properly configured. This guide walks you through step-by-step fixes for the most common FlareSolverr problems, from challenge loops to browser launch issues. By the time you reach the end, you'll know how to: - Stop those timeout errors and challenge loops - Troubleshoot and fix Chrome/Chromium issues - Get Docker set up the right way - Handle missing dependencies without guesswork - Know when it’s time to switch to an alternative tool ## Why You Can Trust This Guide **The problem**: FlareSolverr is throwing more errors than usual: timeouts, Chrome connection failures, and looped challenges are popping up more often as Cloudflare evolves. **The solution**: This guide offers proven troubleshooting steps, built from community discussions, open GitHub issues, and FlareSolverr’s own documentation. **Our approach**: We collected user reports from GitHub issues and forums and fixes into a guide to get FlareSolverr working again. ## Step 1: Diagnose Your FlareSolverr Installation Before we jump into fixing things, let’s make sure you understand what’s going wrong with your setup. ### Check FlareSolverr Logs To see what’s really happening behind the scenes, enable debug logs. This will surface any silent errors that might otherwise go unnoticed. ```bash # For Docker docker run -d \ --name=flaresolverr \ -p 8191:8191 \ -e LOG_LEVEL=debug \ ghcr.io/flaresolverr/flaresolverr:latest # For standalone installation export LOG_LEVEL=debug python src/flaresolverr.py ``` ### Test Basic Connectivity Verify that FlareSolverr is running and responding to basic requests. ```bash curl -L -X POST 'http://localhost:8191/v1' \ -H 'Content-Type: application/json' \ --data-raw '{ "cmd": "request.get", "url": "http://www.google.com/", "maxTimeout": 60000 }' ``` ### Look for Error Clues Check your logs for the most telling error messages. These are the usual suspects: - Timeout errors after 60 seconds - Failure to connect to Chrome - Chrome version not found - Browser process launch errors **Pro tip**: Save those logs to a file so you can easily review or share them when troubleshooting. ```bash docker logs flaresolverr > flaresolverr-debug.log 2>&1 ``` ## Step 2: Fix Timeout and Challenge Loop Errors The most common issue? FlareSolverr times out or gets stuck in a Cloudflare challenge loop. Here’s how to fix it. ### Bump the Timeout Value First, try increasing the timeout limit to give FlareSolverr more breathing room: ```json { "cmd": "request.get", "url": "https://your-site.com", "maxTimeout": 120000 // Increase from 60000 to 120000 (2 minutes) } ``` ### Disable IPv6 Believe it or not, IPv6 often causes problems here. Disabling it on your host and containers may resolve the issue. ```bash # Disable IPv6 on Linux sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1 sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1 # Docker containers (docker-compose.yml) sysctls: - net.ipv6.conf.all.disable_ipv6=1 ``` ### Switch to Host Network Mode This allows FlareSolverr to share the host's network stack, which can help bypass some Cloudflare checks. ```bash docker run -d \ --name=flaresolverr \ --network host \ -e LOG_LEVEL=info \ ghcr.io/flaresolverr/flaresolverr:latest ``` ### Clear the Browser Cache Sometimes it’s just stale data. Restart FlareSolverr to refresh everything: ```bash docker restart flaresolverr ``` **Watch out**: Timeout values over 180,000ms (3 minutes) may overload memory and cause crashes. ## Step 3: Resolve Chrome Connection Issues If FlareSolverr can’t connect to Chrome, you’ll see connection errors or failed browser launches. Let’s fix those. ### Match the Correct Chrome Version FlareSolverr only works reliably with Chromium 126\. Downgrade if necessary. ```bash # Arch sudo pacman -U /var/cache/pacman/pkg/chromium-126.* # Debian/Ubuntu sudo apt-get install chromium=126.* chromium-driver=126.* ``` ### Install Missing Dependencies If Chrome refuses to run due to missing libraries, install the essentials: ```bash # Debian/Ubuntu sudo apt-get update sudo apt-get install -y \ libatk1.0-0 \ libatk-bridge2.0-0 \ libcups2 \ libdrm2 \ libgtk-3-0 \ libnspr4 \ libnss3 \ libxcomposite1 \ libxdamage1 \ libxfixes3 \ libxrandr2 \ libgbm1 \ libasound2 ``` ### Check ChromeDriver Permissions Make sure ChromeDriver is executable and matches your Chrome version: ```bash chmod +x /path/to/chromedriver chromedriver --version chromium --version ``` **Pro tip**: Stick with the official Docker image to avoid these issues entirely - it comes pre-packaged with the right versions and dependencies. --- ## Step 4: Configure Docker and Network Settings FlareSolverr heavily depends on how Docker is set up. Small misconfigurations can cause major problems. ### Basic Docker Setup This command sets up your FlareSolverr container with logging and timezone configured: ```bash docker run -d \ --name=flaresolverr \ -p 8191:8191 \ -v /path/to/config:/config \ -e LOG_LEVEL=info \ -e TZ=America/New_York \ --restart unless-stopped \ ghcr.io/flaresolverr/flaresolverr:latest ``` ### Docker Compose Example Prefer `docker-compose`? Here’s a solid starting point: ```yaml version: '3.8' services: flaresolverr: image: ghcr.io/flaresolverr/flaresolverr:latest container_name: flaresolverr environment: - LOG_LEVEL=info - TZ=America/New_York - BROWSER_TIMEOUT=60000 ports: - "8191:8191" restart: unless-stopped ``` ### Combine with Jackett or Prowlarr When using FlareSolverr alongside Jackett or Prowlarr, make sure they share the same Docker network: ```yaml networks: arr-network: driver: bridge services: flaresolverr: networks: - arr-network prowlarr: networks: - arr-network ``` **Got a firewall?** Make sure port 8191 is open to allow traffic. ## Step 5: Install Missing Dependencies Depending on your OS, missing packages might be stopping FlareSolverr from even starting up. ### Linux Systems Here’s what to install based on your distro: ```bash # Debian/Ubuntu sudo apt-get update sudo apt-get install -y xvfb chromium chromium-driver python3-pip # CentOS/RHEL sudo yum install -y xorg-x11-server-Xvfb chromium python3-pip # Arch Linux sudo pacman -S xorg-server-xvfb chromium python-pip ``` ### Windows Windows users, make sure you’ve got: 1. Visual C++ Redistributable 2. Chrome or Chromium installed 3. Python 3.8+ with pip ### FreeBSD Here’s the one-liner for FreeBSD: ```bash pkg install chromium python311 py311-pip xorg-vfbserver python3.11 -m pip install -r requirements.txt ``` **Reminder**: Get your dependencies sorted *before* launching FlareSolverr to avoid failure during startup. ## Step 6: Update Environment Variables Environment variables give you more control over how FlareSolverr behaves - and can solve a surprising number of issues. ### Core Environment Variables Set these in your terminal or include them in your Docker config: ```bash export BROWSER_TIMEOUT=120000 export LOG_LEVEL=debug export TZ=America/New_York export HEADLESS=true export CHROME_PATH=/usr/bin/chromium ``` ### Docker Configuration with Variables Here’s how to start your container with these set: ```bash docker run -d \ --name=flaresolverr \ -p 8191:8191 \ -e BROWSER_TIMEOUT=120000 \ -e LOG_LEVEL=info \ -e TZ=America/New_York \ -e HEADLESS=true \ ghcr.io/flaresolverr/flaresolverr:latest ``` ### Better Request Management with Sessions Using sessions can improve performance when making multiple requests: ```python import requests session_data = { "cmd": "sessions.create", "session": "my-session", "maxTimeout": 60000 } response = requests.post("http://localhost:8191/v1", json=session_data) session_id = response.json()["session"] request_data = { "cmd": "request.get", "url": "https://example.com", "session": session_id, "maxTimeout": 60000 } ``` **Don’t forget**: Clean up sessions afterward to avoid memory bloat. ## Step 7: Consider Alternative Solutions FlareSolverr isn’t being maintained, and eventually it may stop working altogether. Be ready with a backup plan. ### Open-Source Alternatives Here are some promising tools users are switching to: - **Byparr** \- Built with SeleniumBase and FastAPI - **FlareBypasser** \- Designed to work post-Oct 2024 - **Scrappey Proxy** \- Drop-in compatible with FlareSolverr’s API ### Commercial Tools If uptime and scale are mission-critical, consider these: - **ZenRows** \- Automatically handles Cloudflare bypass - **ScraperBox** \- Headless browser API with rotating proxies - **Zyte** \- Full-fledged web scraping platform ### Know When to Switch It's time to move on when: - FlareSolverr can't solve challenges anymore - You’re hitting CAPTCHA walls - Your scraping needs are scaling up - The target sites get too strict **Pro tip**: Try multiple options before committing - what works best will depend on your use case. ## Final Thoughts Yes, FlareSolverr has its share of growing pains right now, but with the right tweaks it can still do the job. From timeout tuning to Docker and Chrome fixes, this guide gives you a clear path to troubleshoot the most common problems. Just remember: FlareSolverr won’t solve CAPTCHAs, and it's no longer being actively maintained. So if you’re scraping at scale or hitting lots of Cloudflare roadblocks, switch to one of the alternatives listed in Step 7.