If you're looking for a Chrome extension to get information out of PDFs, ChatPDF is a good option. It's an AI-based interface that lets you upload PDFs and ask questions, and it'll return answers and summaries. It can handle multi-file conversations and PDFs in any language, so it's good for students, researchers and professionals.
Another option is AskYourPDF, which uses the ChatGPT conversational interface. The app comes with a Chrome extension, so you can easily integrate it into your browser. That means you can easily get information out of a long PDF. It's got a conversation history so you can follow up, and multiple pricing tiers, so it's good for boosting productivity and document management.
Last is PDF.ai, which takes a similar approach with its interactive information retrieval system. You can upload PDFs and ask questions, and the answers come straight from the documents. It's got a Chrome extension and other features like OCR support and team collaboration, so it can be used in a variety of situations.