Manipulate Firefox's cache

Job ID: 36278419

Budget: $50 – $130 USD

1) I'm using the firefox browser to access the bitget brokerage page, at URL: https://www.bitget.com/en/mix/usdt/XRPUSDT_UMCBL

2) Normally, using the left side menu, I can draw two horizontal lines, as shown in the figure

3) I have a computer just for this page, so we can clear the cache or manipulate it in any way possible

4) the machine is a debian Linux 11, and we are running Mozilla Firefox 78.11.0esr ( if is more easy, we can use Google Chrome, no problem )

5) we can use shell script to manipulate/change any aspect of user home and firefox cache

6) I need to find a way to manipulate / change the position of these lines, using a shell script command, directly messing with the browser's cache or the javascript of the page, without having to do this manually

7) I don't understand browser caching, but I suppose that when I manually change the position of the lines, this is stored in the browser's cache, not sent to Bitget's servers, so I'm sure it might be possible manipulate the cache to change the position of the lines automatically.
Related categories: JavaScript Linux Firefox Debian Bash