localStorage doesn't save the data
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14-04-2021 - |
Question
I'm developing firefox extension and going to save local data in localStorage. So I testing my extension on local saved web page.
window.content.localStorage.setItem('name', 'Hello World!');
And window.content.localStorage.getItem('name')
return correct string.
But when I reopened this testing page window.content.localStorage.getItem('name')
returns 'null'.
Why? It's because I'm using local page?
La solution
Different browsers currently treat file: urls differently for localStorage.
This means that if you are just creating a file on your computer and opening it directly, you will have different results depending on the browser you are using.
I believe this was changed in Firefox 8, so if you use 8 or higher it should work for you. Other browsers I am not sure about.
Edit: Is "localStorage" in Firefox only working when the page is online? seems to confirm that FF3-8 will not work how you are doing it.