fix: signal sqlite that db is read-only

Firefox locks the database when the browser is opened. This will allow
us to open the database even if it's locked.

fixes: #5
requires: kkharji/sqlite.lua@56c5aac

README.md

@@ -112,7 +112,7 @@ Using [packer.nvim](https://github.com/wbthomason/packer.nvim)
 ```lua
 use {
   'dhruvmanila/telescope-bookmarks.nvim',
-  -- Uncomment if the selected browser is Firefox
+  -- Uncomment if the selected browser is Firefox or buku
   -- requires = {
   --   'tami5/sqlite.lua',
   -- }
@@ -123,7 +123,7 @@ Using [vim-plug](https://github.com/junegunn/vim-plug)
 
 ```vim
 Plug 'dhruvmanila/telescope-bookmarks.nvim'
-" Uncomment if the selected browser is Firefox
+" Uncomment if the selected browser is Firefox or buku
 " Plug 'tami5/sqlite.lua'
 ```
 

lua/telescope/_extensions/bookmarks/firefox.lua

@@ -82,7 +82,10 @@ function firefox.collect_bookmarks(state, config)
     return nil
   end
 
-  local db = sqlite.new(utils.join_path(profile_dir, "places.sqlite")):open()
+  local uri = "file:"
+    .. utils.join_path(profile_dir, "places.sqlite")
+    .. "?immutable=1"
+  local db = sqlite.new(uri, { open_mode = "ro" }):open()
   local rows = db:select("moz_bookmarks", {
     keys = { "fk", "parent", "title" },
     where = { type = 1 },