Destroyed 4.1.1 Setting Extension Permission Exceptions (markdown)

4.1.1-Setting-Extension-Permission-Exceptions.md

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-:exclamation: Extensions + localStorage + indexedDB is fixed in FF59+ - see [1406675](https://bugzilla.mozilla.org/show_bug.cgi?id=1406675)
-
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-
-### :small_orange_diamond: The Issue
-
-Cookies control access to **localStorage** and **indexedDB**. The `ghacks user.js` denies cookies by default (although we changed this in v62). This is the pref `network.cookie.cookieBehavior` (see `2701`). A value of `2` denies all cookies, a value of `1` allows first party only.
-
-Extensions <sup>1</sup> that use local dom storage and/or indexedDB **will break** <sup>2</sup> if they are not allowed a cookie, even though they do not actually set any. Extensions that use such storage include uBlock Origin, uMatrix, Stylus and Violentmonkey. Extension IndexedDB entries are located in your `profile\storage\default` directory and start with `moz-extension`.
-
-![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/exceptions03.png)
-
-:exclamation: Note: Private Browsing mode (currently) does not allow IndexedDB
-
-<sup>1</sup> `Extensions` = Web Extensions API, `Legacy Extensions` = legacy APIs or the Add-on SDK.
-
-<sup>2</sup> Some extensions have built in fallbacks to limit or resolve breakage, but the best solution is to allow IndexedDB, which is faster.
-
-### :small_orange_diamond: Strategy
-
-You have two choices
- - Allow first party cookies and use an extension to clean up and/or block cookies and storage
- - Deny all cookies and use site exceptions, **including** exceptions for extensions that need it. And you can still use an extension to clean up and control website cookies and storage if you want.
-
-### :small_orange_diamond: How To Set Extension Cookie Exceptions
-
-- Open `about:debugging > Add-ons`
-- Click on the `Manifest URL` of the extension
-- On the manifest page, right click and select `View Page Info`
-- Select the `Permissions` tab
-- For `Set Cookies`, uncheck `use default` and check `Allow`
-- Restart Firefox for the extension to start using storage
-
-![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/exceptions01.png)
-
-### :small_orange_diamond: Note
-
-- The exception uses the extension's `Internal UUID`, which is a random unique value generated on each install of the extension. So be aware of that if you uninstall and reinstall.
-- You can view cookie exceptions under Options > Privacy & Security > History > Custom Settings > Accept cookies from websites > Exceptions
-
-![](https://github.com/ghacksuserjs/ghacks-user.js/blob/master/wikipiki/exceptions02.png)
-
-`Pro Tip`: If you are not sure what extensions require IndexedDB <sup>1</sup>
-  * enable first party cookies in your `user.js` and restart
-  * check the options (if any) for each extension
-  * look in your `profile\storage\default` directory for `moz-extension` entries (see pic 1)
-  * add these entries manually via the cookies exceptions dialog
-     * just replace `+++` with `://` (see pic 3)
-     * directory: `moz-extension+++e0cc77c6-3785-4297-a034-7896f46563af`
-     * exception: `moz-extension://e0cc77c6-3785-4297-a034-7896f46563af`
-  * set cookies in the `user.js` back to none and restart
-  * clean out any unwanted cookies and storage collected during this exercise
-
-<sup>1</sup> This will not work in Private Browsing mode