fix default browser for termite and vim plugins source

termite_config

@@ -13,7 +13,7 @@ search_wrap = true
 icon_name = terminal
 cursor_blink = off
 cursor_shape = underline
-browser = firefox
+browser = default-web-browser
 size_hints = true
 
 [colors]

vimrc

@@ -59,8 +59,9 @@ nnoremap qw :wq<CR>
 nnoremap <Leader>w :w<CR>
 
 " plugins
-if filereadable(expand("$HOME/vdotfiles/plugins.vim"))
-    source ~/vdotfiles/plugins.vim
+let plugins = expand("$HOME/vdotfiles/plugins.vim")
+if filereadable(plugins)
+    execute 'source ' . fnameescape(plugins)
 endif
 
 colorscheme solarized8_light