neovim easy buffer movement. FZF floating window and vim airline to see them

.vimrc

" This mapping combination with FZF feels great!
" See how this works: https://gfycat.com/wellgroomedofficialblueandgoldmackaw

" Buffers change with index and middle
nnoremap <C-j> :bn<CR>
nnoremap <C-k> :bp<CR>

" Index finger to filter lines in all buffers with jump to line
nnoremap <leader>j :Lines<CR>

" Middle finger to go back to alternate buffer
nnoremap <leader>k :b#<CR>

" Find buffer
nnoremap <C-f> :Buffers<CR>

" Using floating windows of Neovim to start fzf
if has('nvim')
  let $FZF_DEFAULT_OPTS .= ' --border --margin=0,2'

  function! FloatingFZF()
    let width = float2nr(&columns * 0.9)
    let height = float2nr(&lines * 0.6)
    let opts = { 'relative': 'editor',
               \ 'style': 'minimal',
               \ 'row': (&lines - height) / 2,
               \ 'col': (&columns - width) / 2,
               \ 'width': width,
               \ 'height': height }

    let win = nvim_open_win(nvim_create_buf(v:false, v:true), v:true, opts)
    call setwinvar(win, '&winhighlight', 'NormalFloat:Normal')
  endfunction

  let g:fzf_layout = { 'window': 'call FloatingFZF()' }
else 
  let g:fzf_layout = { 'window': 'enew' }
endif



""""""""""""""""""""""""""""
" vim-airline to see your buffers and look nice
""""""""""""""""""""""""""""
Plug 'vim-airline/vim-airline'

let g:airline#extensions#tabline#enabled = 1

" Show just the filename
let g:airline#extensions#tabline#fnamemod = ':t'

" Show terminal buffers
let g:airline#extensions#tabline#ignore_bufadd_pat = 'defx|gundo|nerd_tree|startify|tagbar|undotree|vimfiler'