* Update the extensionStorage actor to enable some writing to extension storage.local through the Storage panel client.
* All values in the client are displayed as strings, so the actor must stringify them before sending them to the client and parse them when receiving changes from the client. For this reason, there is currently limited write support.
* Item values that are JSONifiable (numbers, strings, booleans, object literals, arrays and null) can be edited from the Storage panel.
* Object literals and arrays are only editable if their values are JSONifiable, with a maximum nested depth of 2 (e.g. an object with a nested object is editable, provided the nested object contains only primitive values). Object literals' keys must also be strings to be editable.
* Non-JSONifiable values cannot be edited, and will be represented by "{}" in most cases in the panel, though some non-JSONifiable values (undefined, Date, and BigInt) will be displayed as more readable strings.
* Some modifications are a little more complex, requiring an IndexedDB transaction. This will be handled in a separate patch.
* Item names cannot be edited from the Storage panel.
* New items cannot be added from the Storage panel.
* Any item can be removed.
* All items can be removed at once.
* In-line comments referencing Bugs 1542038 and 1542039 indicate places where the implementation may differ for local storage versus the other storage areas in the actor.
* The parseItemValue method used in the client was moved to a shared directory, so that the actor could parse string values from the client in its editItem method.
Differential Revision: https://phabricator.services.mozilla.com/D34416
Mark Banner