Broken links

[ndsvw]

Hello, I found some broken hyperlinks:

• https://chrome.google.com/webstore/detail/gifhub-pull-request/gfjohbpkkbbflchpioebapldlmiflfho (file: README.md, status code: 404)
• https://addons.mozilla.org/firefox/addon/github-vscode-icons/ (file: README.md, status code: 404)
• https://chrome.google.com/webstore/detail/hacker-tab/ibomigipadcieapbemkegkmadbbanbgm (file: README.md, status code: 404)
• https://chrome.google.com/webstore/detail/octolenses/ghlblfakaklgkdmfejdlffbmpcaidoci (file: README.md, status code: 404)