Update README.md. (#95)

* Update README.md.

Update README.md to add Playwright select issue to known issues.

* Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

* Update README.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: wt17

README.md

@@ -137,3 +137,27 @@ The `main.py` script is the command-line interface (CLI) for running the browser
 | GEMINI_API_KEY | Your API key for the Gemini model. | Yes |
 | BROWSERBASE_API_KEY | Your API key for Browserbase. | Yes (when using the browserbase environment) |
 | BROWSERBASE_PROJECT_ID | Your Project ID for Browserbase. | Yes (when using the browserbase environment) |
+
+## Known Issues
+
+### Playwright Dropdown Menu
+
+On certain operating systems, the Playwright browser is unable to capture `<select>` elements because they are rendered by the operating system. As a result, the agent is unable to send the correct screenshot to the model.
+
+There are several ways to mitigate this.
+
+1. Use the Browserbase option instead of Playwright.
+2. Inject a script like [proxy-select](https://github.com/amitamb/proxy-select) to render a custom `<select>` element. You must inject `proxy-select.css` and `proxy-select.js` into each page that has a non-custom `<select>` element. You can do this in the [`Playwright.__enter__`](https://github.com/google-gemini/computer-use-preview/blob/main/computers/playwright/playwright.py#L100) method by adding a few lines of code, like the following (replacing `PROXY_SELECT_JS` and `PROXY_SELECT_CSS` with the appropriate variables):
+
+```python
+self._page.add_init_script(PROXY_SELECT_JS)
+def inject_style(page):
+    try:
+        page.add_style_tag(content=PROXY_SELECT_CSS)
+    except Exception as e:
+        print(f"Error injecting style: {e}")
+
+self._page.on('domcontentloaded', inject_style)
+```
+
+Note, option 2 does not work 100% of the time, but is a temporary workaround for certain websites. The better option is to use Browserbase.