nvim: configure not even simple stuff in plugin file

.config/nvim/lua/my/coding.lua

@@ -61,6 +61,7 @@ vim.api.nvim_create_autocmd({ 'FileType' }, {
     command = [[set nolist]]
 })
 
+require("nvim-autopairs").setup({})
 
 require('luasnip.loaders.from_lua').load({
     paths = vim.fn.stdpath('config') .. '/snippets'

.config/nvim/lua/my/plugins.lua

@@ -67,12 +67,7 @@ require('packer').startup(function(use)
     -- tools
     local nerdfont_installed = require('my.functions').nerdfont_installed()
 
-    use {
-        'https://github.com/folke/which-key.nvim',
-        config = function()
-            require('which-key').setup({})
-        end
-    }
+    use { 'https://github.com/folke/which-key.nvim' }
     use {
         'https://github.com/nvim-telescope/telescope.nvim',
         tag = '*',
@@ -115,10 +110,7 @@ require('packer').startup(function(use)
         },
     }
     use { 'https://github.com/gentoo/gentoo-syntax' }
-    use {
-        'https://github.com/windwp/nvim-autopairs',
-        config = function() require("nvim-autopairs").setup {} end
-    }
+    use { 'https://github.com/windwp/nvim-autopairs' }
     use { 'https://github.com/L3MON4D3/LuaSnip' }
     use {
         'https://github.com/tpope/vim-fugitive',
@@ -134,9 +126,7 @@ require('packer').startup(function(use)
     use { -- embed nvim in browsers
         'https://github.com/glacambre/firenvim',
         tag = '*',
-        run = function()
-            vim.fn['firenvim#install'](0)
-        end
+        run = [[call firenvim#install(0)]]
     }
 
     -- ensure plugins are installed and compiled

.config/nvim/lua/my/tools.lua

@@ -1,5 +1,7 @@
 require('my/plugins')
 
+require('which-key').setup({})
+
 local map = require('my.functions').map
 local telescope = require('telescope')
 local t_actions = require('telescope.actions')