Browser Extension to Address Cognitive Disabilities, Neurodivergences and Other Related Conditions

Many users with cognitive or neurodivergent conditions encounter significant barriers when interacting with standard web interfaces, often leading to stress, confusion, and premature task abandonment. This thesis presents the design, development, and evaluation of a browser extension aimed at reducing cognitive load and enhancing web accessibility for these user populations. The tool was conceived as an all-in-one, lightweight solution, integrating several accessibility-focused features including content simplification, key concept highlighting, text summarization, and adaptive navigation aids. The design process followed a modified User-Centered Design (UCD) methodology, adapted to accommodate the needs and participation constraints of users with cognitive impairments. User insights were collected through a qualitative questionnaire, which suggested the selection of core functionalities. The extension was developed using Manifest V3 compatible technologies, incorporating JavaScript, DOM APIs, and local NLP libraries to ensure relatively fast functionality and privacy preservation. Usability testing was conducted with a group of volunteers, simulating real-world browsing scenarios. Quantitative metrics and qualitative feedback were collected through task-based evaluations, think-aloud protocols, and a System Usability Scale (SUS) questionnaire. The results indicate a high level of user satisfaction (SUS average score: 88.125), strong task success rates, and widespread appreciation for the tool’s integrated features and minimalist design. These findings support the thesis that even lightweight browser-based interventions can significantly improve web accessibility for neurodivergent individuals. The project provides a replicable framework for inclusive browser extension development and contributes to bridging the accessibility gap in everyday digital experiences.