Ubuntu 17.10下Chromium 64.0.3282.119的Adobe Flash再次失效求助

Hey there, it sounds like you’ve burned through all the standard fixes for your Flash issue—let’s dive into some deeper troubleshooting steps that might get it working again:

• 彻底清理Flash残留文件
  First, wipe all existing Flash packages and leftover files to eliminate hidden conflicts:

  sudo apt purge adobe-flashplugin pepperflashplugin-nonfree flashplugin-installer
  sudo apt autoremove && sudo apt clean
  rm -rf ~/.config/chromium/PepperFlash ~/.mozilla/plugins/*flash*
  

  This ensures no outdated or corrupted files are messing with new installations.

• Verify Chromium’s Flash Plugin Path
  Modern Chromium dumped the old system-wide /usr/lib/chromium-browser/plugins directory. Instead, it looks for PepperFlash in your user profile:

  1. Locate your PepperFlash files (usually at /usr/lib/pepperflashplugin-nonfree/libpepflashplayer.so)
  2. Copy them to ~/.config/chromium/PepperFlash/[版本号]/ (create the folder if it doesn’t exist)
  3. Open Chromium’s chrome://settings/content/flash, toggle on "Ask first", add your target site to the "Allowed" list, then hard-refresh the page with Ctrl+Shift+R

• Downgrade to a Compatible Flash Version
  Recent system updates might have broken compatibility with the latest Flash build. Try installing an older, system-matching .deb package:

  # Replace [flash-deb-file] with the actual filename of the older package
  sudo dpkg -i [flash-deb-file].deb
  # Fix any dependency issues that pop up
  sudo apt -f install
  

  You can lock the package to stop future updates from breaking it again:

  sudo apt-mark hold adobe-flashplugin pepperflashplugin-nonfree
  

• Check for Repository Conflicts
  Third-party PPAs might be pushing incompatible Flash versions. Remove any untrusted or Flash-related PPAs:

  # Replace [ppa-name] with the actual PPA you want to remove
  sudo add-apt-repository --remove [ppa-name]
  sudo apt update
  

• Firefox ESR for NPAPI Flash Support
  Regular Firefox axed NPAPI plugin support years ago. If you need Flash on Firefox, switch to Firefox ESR (Extended Support Release), which still supports older plugins. Install it with:

  sudo apt install firefox-esr
  

  Then install the matching Flash plugin and enable it in Firefox’s about:addons > Plugins.

• Long-Term Workaround: Virtualization
  Since Flash is end-of-life, system updates will keep breaking compatibility. A reliable long-term fix is to run an old browser + Flash in a virtual machine (like VirtualBox) with an older OS (e.g., Ubuntu 20.04 or Windows 7) that still supports Flash natively.

内容的提问来源于stack exchange，提问作者Peter F