Save or load an entire webpage even of whats not loaded till scroll

For the record i do not know why its putting 30-250 price range i can pay higher then 30-

I can pay $200


I am looking for a developer to create a script or tool that can save or load an entire webpage, even if it has not been fully loaded until scrolling. The webpage will be specifically saved or loaded in Mozilla Firefox.

Requirements:
- The entire webpage should be saved or loaded, including any content that has not been loaded until scrolling.
- Full interactivity of the webpage is required after saving or loading.
- The loading time of the saved or loaded webpage is very important and should be optimized for efficiency.

Ideal Skills and Experience:
- Proficiency in web development and experience with Mozilla Firefox browser.
- Knowledge of JavaScript and ability to create scripts or tools for saving or loading webpages.
- Understanding of webpage loading optimization techniques.

Please provide examples of previous work or projects that showcase your skills in web development and ability to optimize loading time.