`gx` to open GitHub URLs on browser. https://github.com/junegunn/vim-plug/wiki/extra#gx-to-open-github-urls-on-browser

plug_gx.vim

" vim-plug
" Press `gx` to open the GitHub URL for a plugin or a commit with the default browser.
" From https://github.com/junegunn/vim-plug/wiki/extra#gx-to-open-github-urls-on-browser
function! s:plug_gx()
  let line = getline('.')
  let sha  = matchstr(line, '^  \X*\zs\x\{7,9}\ze ')
  let name = empty(sha) ? matchstr(line, '^[-x+] \zs[^:]\+\ze:')
                      \ : getline(search('^- .*:$', 'bn'))[2:-2]
  let uri  = get(get(g:plugs, name, {}), 'uri', '')
  if uri !~ 'github.com'
    return
  endif
  let repo = matchstr(uri, '[^:/]*/'.name)
  let url  = empty(sha) ? 'https://github.com/'.repo
                      \ : printf('https://github.com/%s/commit/%s', repo, sha)
  call netrw#BrowseX(url, 0)
endfunction

augroup PlugGx
  autocmd!
  autocmd FileType vim-plug nnoremap <buffer> <silent> gx :call <sid>plug_gx()<cr>
augroup END