.js - \"],\" - removed

[Obegg]

I have the following line in .js:

user_pref("browser.uiCustomization.state", "{\"placements\":{\"widget-overflow-fixed-list\":[],\"unified-extensions-area\":[],\"nav-bar\":[\"back-button\",\"forward-button\",\"stop-reload-button\",\"urlbar-container\",\"save-to-pocket-button\",\"downloads-button\",\"unified-extensions-button\",\"fxa-toolbar-menu-button\"],\"toolbar-menubar\":[\"menubar-items\"],\"TabsToolbar\":[\"tabbrowser-tabs\",\"new-tab-button\",\"alltabs-button\"],\"PersonalToolbar\":[\"personal-bookmarks\"]},\"seen\":[\"save-to-pocket-button\",\"developer-button\"],\"dirtyAreaCache\":[\"nav-bar\",\"PersonalToolbar\",\"toolbar-menubar\",\"TabsToolbar\"],\"currentVersion\":20,\"newElementCount\":5}");

(this is just a setting for Firefox)
and when I try to use prettier it changes this line to:

user_pref(
  "browser.uiCustomization.state",
  '{"placements":{"widget-overflow-fixed-list":[],"unified-extensions-area":[],"nav-bar":["back-button","forward-button","stop-reload-button","urlbar-container","save-to-pocket-button","downloads-button","unified-extensions-button","fxa-toolbar-menu-button"],"toolbar-menubar":["menubar-items"],"TabsToolbar":["tabbrowser-tabs","new-tab-button","alltabs-button"],"PersonalToolbar":["personal-bookmarks"]},"seen":["save-to-pocket-button","developer-button"],"dirtyAreaCache":["nav-bar","PersonalToolbar","toolbar-menubar","TabsToolbar"],"currentVersion":20,"newElementCount":5}'
);

which completely changes the line and makes this setting no longer work because the \"],\" characters are no longer part of the setting.
I wasn't sure if it's a bug or not, so I decided to post it here,
I don't know how to make it so prettier won't ruin this specific line.