Some WordPress optimization plugins allow you to view the original page without applying optimizations to compare and check if it works correctly before applying them.
You can view the original page by adding a query parameter to the URL.
Note that the first parameter of the URL is preceded by "?" and subsequent parameters are preceded by "&".
?ao_noptimize=1
https://example.com?ao_noptimize=1
?nowprocket
https://example.com?nowprocket
?LSCWP_CTRL=before_optm
https://example.com?LSCWP_CTRL=before_optm
?perfmattersoff
https://example.com?perfmattersoff
If your site breaks due to a snippet and you can't load the backend to disable it, you can use this parameter in the URL to disable all snippets.
&snippets-safe-mode=1